Answer:Intermediates of a multistep reaction sequence do not dissociate from the enzyme complex.
Explanation:
Substrate channeling is the moving of intermediate metabolic product of one enzyme to another enzyme without it be lost to another enzyme.
Channeling makes metabolic pathway more fast and efficient that it will be when the enzyme are at random.
It avoid the use up of intermediate formed by other reaction catalyze by another enzyme.
For pyruvate dehydrogenase channeling prevent the intermediate from dissolving and been used up by other reaction.
Substrate channeling in the PDH complex improves reaction speed, minimizes side reactions, and sequesters reactive intermediates. It raises efficiency by avoiding the limitations of diffusion constants and reducing the dissociation of intermediates.
Explanation:Substrate channeling in the Pyruvate Dehydrogenase (PDH) complex provides several advantages in biochemical reactions. The benefit of substrate channeling lies mainly in three aspects: improvement of reaction speed, minimization of side reactions, and sequestration of reactive intermediates.
Since the active sites of different enzymes are closely aligned in substrate channeling, the intermediates do not need to diffuse out into the aqueous solution before they are used by the next enzyme. This prevents reaction progress from being limited by the diffusion constant and increases the overall reaction speed. Furthermore, it prevents the intermediates of a multi-step reaction sequence from dissociating from the enzyme complex, thus minimizing the chance of side reactions.
Another advantage is that reactive or unstable intermediates are sequestered within the enzyme complex, preventing unwanted reactions with other cellular components. Therefore, substrate channeling enhances the efficiency and control of metabolic pathways.
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The best evidence that prokaryotic genes cannot contain introns is that, Group of answer choices the introns are cut out during binary fission. integrated viral DNA is not recognized for transcription. bacterial proteins are very short and not subject to mutation. translation sometimes begins before transcription has been completed because prokaryotes do not have a nucleus. due to the short time the bacterium is around as a single organism, a 5' cap and poly (A) tail are added immediately for translation to take place.
Answer:
the correct option is : "translation sometimes begins before transcription is complete because prokaryotes have no nucleus."
Explanation:
Prokaryotic cells do not have a membrane around the nucleus, or around their organelles, and store their genetic material in a single large DNA molecule. All prokaryotic organisms are single-celled, while eukaryotes can have one or more cells
What will most likely happen to a plant that does not receive enough C02?
A. The Calvin cycle will increase production of glucose.
B. The Calvin cycle will produce less glucose.
C. The light reactions will stop absorbing light energy.
D. The light reactions will occur faster.
The answer is [ B. The Calvin cycle will produce less glucose. ]
A plant needs to take in carbon dioxide to produce glucose. So, if a plant were to not receive enough CO2, then the plant will produce less amounts of glucose. Glucose is created through the photosynthesis process. Plants use the sun to create glucose and oxygen from water and CO2.
Best of Luck!
Answer:
B
Explanation:
Can antibody diversity in humans be explained solely by V(D)J recombination? Why or why not?Several proteins must work in a coordinating fashion to achieve V(D)J recombination. Which is responsible for adding nontemplated nucleotides to the V-D and D-J joints of Ig heavy chains?Recognition spacer sequences are separated by how many base pairs?If a given B cell is found to be potentially reactive to self-antigens, can the cell make an effort to correct that flaw, or is it destined for eventual removal by apoptosis?
Answer:
1) check the attached file below
2) recognition spacer sequences are separated by 12 or 23 base pairs
Explanation:
Members of the Deinococcus genus present an interesting conundrum to scientists who try to classify them as either gram-positive or gram-negative. Deinococcus has a thick layer of peptidoglycan and also an outer membrane. Explain why these features complicate its classification
Answer:
Explanation:
Bacteria can be classified traditionally into two broad categories according to their cell wall, which are Gram-positive bacteria and Gram-negitive bacteria.
Gram-positive bacteria are bacteria that produce a positive result when Gram stain test is performed. It takes up the crystal violet stain of the test, and then show a purple-coloured appearance when seen through an optical microscope. This is as a result of the thick "peptidoglycan" layer in the bacterial cell wall which retains the stain used in the cell after washing it away from the rest of the sample.
Gram-negative bacteria after the decolorization don't retain the violet stain,the outer membrane of gram-negative cells is degraded by the alcohol.The peptidoglycan layer is positioned and between the membrane and a bacterial outer membrane, causing them to take up the counterstain and made appear red or pink.
Therefore, Deinococcus is one genus of the bacterial phylum that have resistant to environmental hazards. They posses thick cell walls that give them Gram-positive stains, but they also posess second membrane that made them them closer in structure to Gram-negative bacteria, which present an interesting conundrum to scientists who try to classify them as either gram-positive or gram-negative.
In 1814, 15 British colonists founded a settlement on Tristan da Cunha, a group of small islands in the Atlantic Ocean, midway between Africa and South America. One of the early colonists apparently carried a recessive allele for retinitis pigmentosa, a progressive form of blindness that afflicts homozygous individuals. Of the founding colonists' 240 descendants on the island in the late 1960s, 4 had retinitis pigmentosa (rr). The frequency of the allele that causes this disease is ten times higher on Tristan da Cunha than in the populations from which the founders came. Calculate the frequency of the r allele in the original population of 15 colonists and in the 240 descendants. Please show calculations, Thanks!
Answer:
Frequency of the allele "r"causing the disease on Tristan da Cunha[tex]= 1.67[/tex] %
Frequency of the allele "r"causing the disease in the original population of 15 colonists [tex]= 16.7[/tex]%
Explanation:
Frequency of the allele "r"causing the disease on Tristan da Cunha
Given -
Out of 240 descendants on the island, 4 had retinitis pigmentosa (rr).
As per Hardy Weinberg's equllibrium equation
The frequecy of recessive individual in a given population is represented by [tex]q^2[/tex]
And q represents the frequency of allele r
So, in this case q is equal to
[tex]\frac{4}{240} * 100\\[/tex]
[tex]= 1.67[/tex] %
Frequency of the allele "r"causing the disease in the original population of 15 colonists
As it is given in the question statement , the frequency of allele "r"causing the disease in the original population of 15 colonists is ten times the frequency of the allele "r"causing the disease on Tristan da Cunha
i.e
[tex]1.67 * 10\\[/tex]
[tex]= 16.7[/tex]%
match each feature to its description
The matching can be done as;
scales:internal support system.pharyngeal gill slits: reptile notochord:flexible structure.What is matching?Matching is the assigning the right terms to the right definitions.
For instance, Scales serves as a internal support system that allowed for large, heavy bodies.
Amniotic egg serves as structure that develops within the mesoderm and allowed for more complex internal organ formation.
CHECK THE COMPLETE QUESTION BELOW;
Match each feature to its description.
1.) Scales
2.) pharyngeal gill slits
3.) notochord
4.) endoskeleton
5.) coelom
6.) Amniotic egg
A.) Internal support system that allows fir heavy bodies.
B.) feature that arose in reptiles and helped vertebrates to colonize land
C.) flexible structure that supports the nerve cord and led to the evolution of the backbone.
D.) structure that develops within the mesoderm and allowed for more complex internal organ formation.
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are humans ivasive species
Answer:
Plants, animals, or pathogens that are non-native (or alien) to the ecosystem under consideration and whose introduction causes or is likely to cause harm.”
Explanation:
so, yes
Answer:
No Humans are not ivasive species
Notable examples of invasive plant species include the kudzu vine, Andean pampas grass, and yellow starthistle. Animal examples include the New Zealand mud snail, feral pigs, European rabbits, grey squirrels, domestic cats, carp and ferrets.
What morphology is represented in the picture? A) spirilla B) rod shaped C) filamentous D) cocci
Hi there!
This bacteria's morphology is rod-shaped. The flagella can be confusing and cause you to choose filamentous, but filamentous bacteria are simple strands. Spirilla bacteria are spiral shaped, and cocci bacteria are spherical.
I really hope this helps!!
The morphology of bacteria represented in the picture is rod shaped. Thus, option B is correct.
What is morphology?Morphology is the distinguishing characteristic of bacterial cell, which describes about the shape of the cell. Particular species of bacteria has particular morphology, hence it is the characteristic feature to distinguish between different bacterial species.
These morphologies are examined with the help of microscope. The basic morphologies are:
coccusbacillifilamentousspirochetevibrioCocci are spherical shaped cells which can be coccus (singular), diplococcus, sarcina, tetrad, stephylococcus, streptococcus based on number of cells and their arrangements.
Bacilli are rod shaped cells which can be bacillus (singular), cocobacillus, diplobacillus, streptobacillus, palisade. Therefore in the given picture, the morphology of cell is rod shaped. hence option B is correct.
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Frozen pieces of pure water (ice) are placed into a liquid. The ice sinks. What can you conclude?
A. The ice did not have any air bubbles trapped inside.
OB. The liquid is less dense than water.
C. The liquid was very hot.
D. Pure water is denser than impure water.
PLZ ANSWER ASAP
Answer:
B. The liquid is less dense than water .
Explanation:
If something is more dense it will sink and if something is less dense it will rise, therefore the ice is more dense than the liquid. If the ice is more dense than the liquid is less dense.
Match each type of association with the best example:
1. commensalism
2. mutualism
3. parasitism
4. amensalism
a. A mold produces a chemical that kills bacteria without apparently benefiting
b. "Aerobic bacteria in the human colon consume oxygen, making it possible for anaerobic species to survive"
c. "Flagellates live in the gut of termites, feeding on the wood consumed by the termite and allowing the termite access to nutrition and energy in wood that they could not otherwise digest"
d. "A helminth takes up residence in a human digestive tract, consuming nutrients"
Answer:
1. commensalism ( A )
2. mutualism ( C )
3. Parasitism ( B )
4. amensalism ( D )
Explanation:
Mutualism ; in this kind of relationship both parties benefit.
commensalism ; in this kind of relationship on party benefits without causing harm or damage to the other.
Parasitism ; Only one party benefits here by inflicting damages on the other.
amensalism ; a relationship between two different organisms in which one inhibits or destroy the other without been affected.
Answer:
1. commensalism "Aerobic bacteria in the human colon consume oxygen, making it possible for anaerobic species to survive"
2. mutualism "Flagellates live in the gut of termites, feeding on the wood consumed by the termite and allowing the termite access to nutrition and energy in wood that they could not otherwise digest"
3. parasitism "A helminth takes up residence in a human digestive tract, consuming nutrients"
4. amensalism "A mold produces a chemical that kills bacteria without apparently benefiting"
Explanation:
1. commensalism: one species benefits while the other species neither benefit nor prejudiced
2. mutualism: two species benefit
3. parasitism: one species benefits while the other species is prejudiced
4. amensalism: one species is unaffected while the other species is prejudiced
The interaction between DNA and histone proteins (forming nucleosomes) plays a key role in the regulation of gene expression in eukaryotes and is a potential target mechanism in drug discovery. You are testing a drug which blocks the activity of histone acetyltransferases (HATS) in cancer cells. In general, what do you expect to happen with regards to chromatin structure and gene expression in cells treated with the drug? Please select the most correct answer.
A. The chromatin near cis-regulatory sequences will be more closed and there will be less transcription.
B. The chromatin near cis-regulatory sequences will be more open and there will be more transcription.
C. The chromatin near cis-regulatory sequences will be more open and there will be less transcription.
D.The chromatin near cis-regulatory sequences will be more closed and there will be more transcription.
E. There should be no effect on chromatin structure or gene transcription. HATs only function in the packaging of DNA prior to mitosis.
Answer:
A. The chromatin near cis-regulatory sequences will be more closed and there will be less transcription.
Explanation:
In the presence of histones, the cis-regulatory sequences of DNA like promoter, enhancers etc. are not exposed. The function of the histone acetyltransferases (HATS) is to cause chromosome decondensation i.e. removal of histones from the DNA so that transcription of the DNA could occur. Histone acetyltransferases (HATS) cause acetylation of lysine amino acid of the histone proteins. Acetyl group is negatively charged so the acetylation of histone proteins leads to the removal of their positive charge which ultimately leads to the decrease in the interaction between N terminal of histones and negatively charged phosphate group of the DNA molecule. As soon as histones are removed from the DNA where cis-regulatory sequences are located, the DNA becomes accessible for transcription.
But here a drug has been added which blocks the activity of histone acetyltransferases (HATS) in cancer cells. So it is quite evident that in these cells, histones will not get removed from the cis-regulatory sequences of DNA so the DNA will be more closer or tightly packed as a result of which less transcription will occur.
The bacterium responsible for gastric ulcers, Helicobacter pylori, survives the acidic pH of the stomach surprisingly well. It does so in part by synthesizing and excreting large amounts of the enzyme urease, which hydrolyzes urea to bicarbonate and ammonia. Explain how these reaction products lead to a less acidic environment for H. pylori.
Answer:
H. pylori uses the enzyme urease to breakdown urea into ammonia (NH3) & carbon dioxide (CO2), where NH3 can act as a buffer to the acidic solution in the stomach.
Explanation:
H. pylori is a bacteria that has the enzyme urease to breakdown urea into ammonia (NH3) & carbon dioxide (CO2). The compound of interest here would be ammonia, or NH3. NH3 is a base, although relatively weak to other stronger bases, which means it has a pH above 7. In the stomach, the pH is acidic, or below 7. By synthesizing ammonia, H. pylori is able to buffer the stomach solution in a manner so that it isn't entirely acidic, but more toward the basic side, thereby allowing for its survival.
Can anyone help me with this please
Answer:
Explanation: the organism is good at the function it serves in it's habitat
Which of the following statements about bacterial growth is false? Group of answer choices Agar is used as a solidifying agent in some types of media A turbid culture is indicative of bacterial growth. Each bacterium plated will represent a colony-forming unit. Bacteria growing in a liquid culture will generate colonies.
Answer:
Bacteria growing in a liquid culture will generate colonies.
Explanation:
The false statement about bacterial growth is that bacteria growing in a liquid culture will generate colonies. Bacteria do not form colonies in a liquid culture, but rather grow dispersedly. They only form colonies when grown on a solid medium like agar.
Explanation:The statement that is false about bacterial growth among the options provided is: 'Bacteria growing in a liquid culture will generate colonies'. This statement is incorrect because bacteria grow dispersedly in a liquid culture medium and do not form colonies. They only form colonies when grown on a solid medium such as agar. Agar is indeed used as a solidifying agent in some types of media, and a turbid, or clouded, culture is an indication of bacterial growth. Also, each bacterium plated in a solid medium will usually represent a colony-forming unit.
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In an insect,
a. nutrients are circulated through an open circulatory system.
b. the blood vessels do not form a continuous circuit
c. the fluid flowing through the heart is the same fluid that bathes the tissues.
d. the circulatory system is responsible for exchange of respiratory gases
Answer:
In an insect, A. nutrients are circulated through an open circulatory system.
Explanation:
Insect respiration is independent of its circulatory system, that's way the blood does not play a direct role in oxygen transport and the circulatory system is responsible for exchange of respiratory gases. Insects also have an open circulatory system as opposed to our closed circulatory system.
What are thought to have been present before vertebrates.
2. Cladograms are graphic representations of evolutionary history, which is called They
are sometimes referred to as phylogenetic trees.
3. Each node, or intersection, on a cladogram represents a/n_ _between two species.
4. Traits, or characteristics, that organisms develop and are passed down to become new
species are called traits.
5. Traits or structures that likely developed from common ancestors are called
structures.
6. Traits or structures that have a similar function, or job, but are not shared due to common
ancestry are called structures
7. Primates are a group of animals that have developed many adaptations such as larger brains,
binocular vision and thumbs that support arboreal life.
8. New World monkeys differ from Old World monkeys because they have which act as
additional hands when living in the trees.
9. is an early australopithecine skeleton, found in 1974.
10. Homo is not thought to have evolved into Homo sapiens. The two are now thought to
have been present at the same time as sister species.
Answer:
1. Chordates
2. phylogeny
3. most recent common ancestor
4. derived
5. homologous
6. analogous
7. opposable
8. prehensile tails
9. Lucy
10. neanderthalensis
11. Using comparative anatomy, scientists identify similarities and differences in the anatomy of different species. Scientists would search for homologous structures, analogous structures, and vestigial structures to provide clues as they construct a cladogram.
Explanation:
From Penn Foster
The study of a living being is called biology.
The correct answer is as follows:-
Chordates are thought to have been present before vertebrates. Cladograms are graphic representations of evolutionary history, which is called They phylogeny are sometimes referred to as phylogenetic trees Each node, or intersection, on a cladogram, represents the most recent common ancestor between two species Traits, or characteristics, that organisms develop and are passed down to become new species are called derived traits. Traits or structures that likely developed from common ancestors are called similar structures. Traits or structures that have a similar function, or job, but are not shared due to common ancestry are called different structuresopposable Primates are a group of animals that have developed many adaptations such as larger brains, binocular vision and thumbs that support arboreal life.New World monkeys differ from Old World monkeys because they have prehensile which act as additional hands when living in the trees. lucy is an early australopithecine skeleton, found in 1974. neanderthalensis is not thought to have evolved into Homosapiens. The two are now thought to have been present at the same time as sister species.
Hence, these are the answer to the following question.
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Label the parts in the diagrams (Plant Cell and Animal Cell) Please help!
Answer:
the ovals are mitochondria, the fat outer layer on the plant cell is a cell wall, the blank stuff is cytoplasm, the round things are nuclei, the squiglly stuff inside the nucleus is DNA, the thin outer later inside the cell wall on the plant but on the outside of the animal is the cell membrane
Explanation:
Which of the following best describes the pattern of microbial death? Which of the following best describes the pattern of microbial death? The pattern varies depending on the species. Not all of the cells in a culture are killed. The cells in a population die at a constant rate. All the cells in a culture die at once. The pattern varies depending on the antimicrobial agent.
Answer:
The cells in a population die at a constant rate
Explanation:
Microbial death is the loss of the ability of microbes to reproduce and survive in an environment. When a given microbial population is given a treatment, the microbial cells die at a constant rate. Microbial death rate is not dependent on the specie and nor on the antimicrobial agent.
Therefore, the microbial cells in a population does not die at once but die at a constant logarithmic rate; the cells decreases exponentially as nutrients decreases and waste product increases.
For example, if 500,000 microbes are treated or in a nutrient depleted environment and 50,000 microbes is left after 1 minute, by the next minute under the same condition 5,000 microbial cells will be left and this pattern will continue, this explains exponential decrease
Microbial death typically follows a pattern of exponential death, where the cells in a population die at a constant rate.
Explanation:The pattern of microbial death can vary depending on the species and the antimicrobial agent used. However, in general, the cells in a population die at a constant rate, following a pattern known as exponential death. This means that the population shrinks by a constant fraction over a given time period, resulting in a gradual decrease in the number of viable cells.
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Determine if the limiting factors listed below are density-dependent or density-independent.
industrial pollution
habitat
food
a hurricane
number of mates
hunting by humans
industrial pollution independent
habitat dependent
food dependent
a hurricane independent
number of mates dependent
hunting by humans independent
The limiting factors industrial pollution and a hurricane are density-independent as they affect populations regardless of density; while habitat, food, and number of mates are density-dependent due to their reliance on population size. Hunting by humans can be considered both but is typically classified as density-independent.
Explanation:To determine if the limiting factors listed below are density-dependent or density-independent, we have to understand how they affect a population's mortality rate based on the population's density. Density-dependent factors usually increase in intensity as the population density increases and are mostly biotic such as predation, competition, and diseases. On the other hand, density-independent factors affect mortality at all densities and are typically abiotic like natural disasters or pollution.
Industrial pollution - Density-independent. It affects populations regardless of their density.Habitat - Density-dependent. It influences population based on how many individuals share the space.Food - Density-dependent. Food scarcity affects populations more when densities are higher due to competition.A hurricane - Density-independent. It can impact populations irrespective of their size.Number of mates - Density-dependent. Availability of mates affects reproductive success and varies with population density.Hunting by humans - This can be both, but generally considered density-independent as hunting can occur regardless of the population size, although at high densities, there may be more targets.Learn more about Density-Dependent vs. Density-Independent Factors here:https://brainly.com/question/29521423
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a change in allele frequency due to random events is called?
One form of chromatin modification is acetylation, which is known to occur on positively charged histone tail amino acids, thus neutralizing the charge. Based on your understanding of chromatin packaging, we would expect this to (INCREASE/DECREASE/NOT IMPACT) DNA compaction. Which of the following statements best explains your answer?
A. The tails do not interact with the DNA.
B. The tails would now be unable to link together two nucleosomes.
C. The tails would now more tightly interact.
Answer:
A. The tails do not interact with the DNA
Explanation:
The acetylation refers to the transfer of the acetyl group from Acetyl-CoA to the N-terminal of the histone protein.
Lysine residues (positively charged amino acid) are present at the end of the N-terminal of the histone protein which is neutralized by the acetyl group.
This loses the compaction between the positively charged histone and the negatively charged DNA and the DNA becomes more relaxed. This relaxed state allows the transcription factors to easily bind the DNA and therefore the DNA becomes transcriptionally active.
Thus, Option-A is correct
Definition: This is a chemical process that uses light to process carbon dioxide in plants.
Example: Producers perform this function
es
)
Term: Type term here
Cells Function
(Bio4A Prokar
Answer:
photosynthesis
Explanation:
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An enhancer may increase the frequency of transcription initiation for its associated gene when… (indicate true or false for each statement and explain your answer…) A. …it is located 1000 nucleotides upstream of the gene’s core promoter. B. ...it is located 1000 nucleotides downstream of the gene’s core promoter. C. …it is in the gene’s coding region.
Answer:
it is located 1000 nucleotides upstream of the gene’s core promoter - true
it is located 1000 nucleotides downstream of the gene’s core promoter- true
it is in the gene’s coding region - False
Explanation:
These enhancers are located 50 or more kilobases from the promoter they controlled upstream from a promoter, downstream from a promoter within an intron, or even downstream from the final exon of a gene which can be thousands of bp away from the gene's core promoter and can also occur thousands of nucleotides away from the gene's core promoter needing the activity of a DNA -bending protein that binds to the enhancer changing the shape of the DNA and allow interactions between the activators and transcription factors.
Different cloning vectors are able to accept inserts of different sizes. Small plasmid vectors, for example, can clone insert fragments up to about 20,000 bp long. The Human Genome Project scientists also used large plasmid vectors call Bacterial Artificial Chromosomes (BACs) that could clone fragments of the human genome 100,000 - 200,000 base pairs long. Which of the following statements is true about genomic libraries made in small plasmids vs. BAC vectors?
a. A complete genomic library made in small plasmid vectors will not contain overlapping recombinant clones: a complete genomic library made in BAC vectors will contain overlapping clones and this is necessary regardless of insert size.
b. A complete genomic library made in small plasmid vectors will contain more independent recombinant clones than a complete genomic library made In BAC vectors.
c. It is impossible to generate a complete genomic Runty in small plasnud vectors because it would require mote genomic DNA fragments than d Is possible to obtain
Answer:
A) A complete genomic library made in small plasmid vectors will contain more independent recombinant clones than a complete genomic library made In BAC vectors.
Explanation:
Different cloning vectors are able to accept inserts of different sizes. Small plasmid vectors, for example, can clone insert fragments up to about 20,000 bp long. The Human Genome Project scientists also used large plasmid vectors call Bacterial Artificial Chromosomes (BACs) that could clone fragments of the human genome 100,000 - 200,000 base pairs long. Which of the following statements is true about genomic libraries made in small plasmids vs. BAC vectors because A complete genomic library made in small plasmid vectors will contain more independent recombinant clones than a complete genomic library made In BAC vectors.
Summarize the development of a calf fetus during gestation.
Final answer:
The development of a calf fetus during gestation involves the growth from a zygote to a fetus, organ and structure development, and rapid growth in the third trimester with critical development in the brain, liver, and ossification process.
Explanation:
Fetal Development During Gestation
The development of a calf fetus during gestation is a complex process that starts with a zygote and progresses through the embryonic stage to form a fully developed fetus. During the first trimester, major organs begin to form, the backbone, muscles, and bone tissue start to develop, and the fetus will be able to move its small limbs. By the end of the second trimester, the fetus grows to about 30 cm (12 inches) and becomes active, with the mother typically feeling movements. The placenta now fully takes over nutrition and waste management and hormone production. In the third trimester, rapid growth occurs, and the fetus reaches 3 to 4 kg (6½ -8½ lbs.) and 50 cm (19-20 inches) in length. Organ development continues up to and after birth, with significant growth of the nervous system and liver.
Key Developments:
The brain continues to expand.The ossification process replaces cartilage with bone.The liver begins to secrete bile, and bone marrow starts erythrocyte production.The development of the amniotic sac and umbilical cord.Rapid growth and development of organs in the last trimester.GENETICS VOCABULARY QUIZ
The color of dog fur is inherited. Fur can be black (B) or white (b).
The father dog has black hair (BB), and the mother dog has white hair
(bb).
1. What is the trait that this story is talking about?
2. What are the alleles for this trait?
3. Which allele is dominant?
1. The trait that this story is talking about is the color of dog fur.
2. The alleles for this trait are B (for black fur) and b (for white fur).
3. The allele B is dominant.
1. The trait in question is directly stated in the scenario provided: it is the color of the dog's fur. This is the characteristic being inherited and displayed by the dogs in the story.
2. Alleles are different versions of the same gene. In this case, the gene responsible for fur color has two alleles: B, which codes for black fur, and b, which codes for white fur. These alleles are what the dogs' offspring can inherit from their parents.
3. Dominance refers to the ability of one allele to mask the presence of another allele in the phenotype of an organism. In the given scenario, the father dog has black hair and is homozygous for the black fur allele (BB), meaning he has two copies of the B allele. The mother dog has white hair and is homozygous for the white fur allele (bb), meaning she has two copies of the b allele. Since the offspring of these two dogs could have black fur (if they inherit at least one B allele), but not white fur unless they inherit two b alleles, we can conclude that the B allele is dominant over the b allele. This is because the dominant allele (B) will result in a black fur phenotype even if only one copy is present, while the recessive allele (b) will only result in a white fur phenotype if two copies are present.
What is the definition of bioarchaeology? Group of answer choices the study of all animal skeletal remains from archaeological sites the application of skeletal analysis to assist in legal investigations the study of the cultural life of living people the study of human skeletal remains from archaeological sites
Answer: bio archaeology:
the study of bones and other biological materials found in archaeological remains in order to provide information about human life or the environment in the past:
Explanation:
L In the common garden pea (pr um sativum),the gene for red flower color (R) is_dominant to the gene for white flower color
(i). If a homozygous red plant is crossed with a white plant, what will be the genotype of iheloffspringr If two members of the Fl generation are crossed witlh each other, what will b"e the genotypes and phenotypes ofthe F2 generation
Answer:
RR - homozygous red
Rr- heterozygous red
rr - homozygous white
Explanation:
Given -
Allele for red color of flower is "R" and allele for white color flower is "r"
Also, R is dominant over r
In the F1 cross a homozygous red plant is crossed with a homozygous white plant.
Genotype of homozygous red plant - RR
Genotype of homozygous white plant - rr
RR * rr
Rr, Rr, Rr, Rr
In the F2 cross, offsprings of F1 generation are crossed.
Rr* Rr
RR, Rr, Rr, rr
Genotype & Phenotype
RR - homozygous red
Rr- heterozygous red
rr - homozygous white
The refractory period is a:
a. postorgasmic period when females are relatively unresponsive to sexual stimulation.
b. postorgasmic period when males are relatively unresponsive to sexual stimulation.
c. preorgasmic period when males are relatively unresponsive to sexual stimulation.
d. prepubescent period when males and females are relatively unresponsive to sexual stimulation.
Final answer:
The correct answer is b. postorgasmic period when males are relatively unresponsive to sexual stimulation. The refractory period is a postorgasmic period when males are relatively unresponsive to sexual stimulation, occurring during the resolution phase of the sexual response cycle.
Explanation:
The refractory period is a time following an orgasm during which an individual is incapable of experiencing another orgasm. Specifically, in males, it is the time after ejaculation when they are unresponsive to sexual stimuli. According to Masters and Johnson's four phases of the sexual response cycle, which include excitement, plateau, orgasm, and resolution, the refractory period occurs during the resolution phase. The duration of the refractory period can vary, ranging from minutes to hours, and tends to increase with age. While both sexes experience orgasm, the refractory period is particularly noted in males, as they cannot maintain an erection or ejaculate during this time.
how to improve our city streets?
Answer:
Choose different ways to get around your city. Walk, bike, skateboard, scooter, take public transit, as many times a week as you can. Focus especially on those short trips–for example, buy a shopping trolley and walk to the grocery store if possible.
Answer: BY FOLLOWING THE BELOW GIVEN IDEAS WE CAN IMPROVE OUR CITY STREETS.
Explanation:
IDENTIFYING THE ISSUES
The quality of life in many European cities is affected by the
negative impacts of increasing traffic
levels. This chapter looks at ways in
which a dominance of car traffic
affects our lives in urban areas, and
suggests that there is a growing
consensus, from the global to the
local level, that the situation is
unsustainable.
PROVIDING GUIDELINES Redistributing road space in favour of non-car modes can represent a
technically challenging and politically
sensitive planning option in urban
areas where road congestion is
already a problem.This chapter
brings together best practice from a
wide range of expertise and
experience in dealing with these
issues, in particular that drawn from
the schemes described in this
document. The objective is to assist
politicians and planners working to
develop more sustainable transport
strategies for Europe’s towns and
cities.
FINDING SOLUTIONS
The traditional response to the problem of traffic congestion has
been to increase the road space available for cars. In this chapter, the
theory of ‘traffic evaporation’ is
explored as a concept which
challenges the logic of this approach.
This theory supports the proposition
that reducing road capacity for cars
in congested city centres can
represent a sustainable, efficient
planning solution. In addition, once
freed from domination by car traffic,
reclaimed urban spaces can become
accessible, vibrant ‘living’ places.
PRESENTING THE CASE STUDIES• Kajaani, Finland
• Wolverhampton, England
• Vauxhall Cross, London, England,
• Nuremberg, Germany
• Strasbourg, France
• Gent, Belgium
• Cambridge, England
• Oxford, England
This chapter presents the experiences of a small selection of
European cities where urban
planners, with the political support of
local leaders, have had the vision and
the courage (often in the face of
considerable opposition) to take
away congested road space from
private cars. In each case study, after
an initial settling-in period, the
predicted traffic chaos did not
materialise and some of the traffic
‘evaporated’.