Answer:
Stronger; a hydrophobic has lower dielectric constant. The lower the dielectric constant of the interior, the stronger the ionic interactions.
Explanation:
Ionic interactions are the electrostatic interactions between the oppositely charged ions. The strength of ionic interaction depends on the magnitude of the charges on the ions, the distance between the charged groups and the dielectric constant.
Here, the dielectric constant is the property of the medium in which the ionic interactions are taking place. Dielectric constant represents the number of dipoles present in the medium or solvent. A medium with higher dielectric constant would attract the oppositely charged ions towards its own dipole and would thereby, make the ionic interaction between the ions weaker.
Given that the ionic bonding between substrate and enzyme is taking place in the hydrophobic interior, ionic interactions would be stronger since the hydrophobic medium has a lower dielectric constant.
The lower number of the electric dipoles or their absence in the hydrophobic interior would not attract the oppositely charged groups of substrate and enzyme towards its own dipoles as the water with higher dielectric constant would have done. This would allow stronger ionic interaction between the substrate and the enzyme.
After the drought of 1977, researchers on the island of Daphne Major hypothesized that medium ground finches that had large, deep beaks survived better than those with smaller beaks because they could more easily crack and eat the tough Tribulus cistoides fruits. If this hypothesis is correct, what would you expect to observe if a population of these medium ground finches colonizes a nearby island where T. cistoides is the most abundant food for the next 1000 years?
Answer:
If a population of medium ground finches with large, deep beaks colonizes a nearby island where Tribulus cistoides is the most abundant food for the next 1000 years, it is expected that this finches population will dominate de island, displacing the smaller beaked birds.
Explanation:
Since large seeds will be available for the next 1000 years as the most abundant food, only birds with large beaks will be able to eat them. Smaller beaked birds won´t be able to feed on them, and eventually, they will starve because they won´t have any food. In this way, the finch population will rapidly change on the new island in favor of the medium ground finches with large, deep beaks.
In a playoff game between the State City Champions and the Anytown Victors, Sara initially bet against the State City Champions, who eventually won. After the game, she claimed she knew the Champions would be the winners. This is an example of a flaw in thinking called the _____ bias.
Answer:
This flaw of thinking is called the HINDSIGHT bias.
Explanation:
"We don't really know the result, but we think as though we do."
The Hindsight bias, creeping determinism, or knew-it-all-along phenomenon, is the assumption of an individual regarding an event that have already occurred as expected, as if he knew it even before the event took place. This leads to the person believing they have a high sense of certainty of what the outcome would really be, even before the culminating of the event. This usually results to overconfidence or overestimation in recalling the sequence of events before the predicted bias.
There are 3 levels of hindsight bias Memory distortion - unable to recall the previous judgment ("I said it would happen").Inevitability - the event must happen even with or without the circumstances (“It had to happen”).Foreseeability - that belief and confidence wherein results of the event were already anticipated, even way before the event culmination (“I knew it would happen”).A guest called an operation and told the manager about getting sick after eating there.The guest complained of vomiting and diarrhea a few hours after eating the raw oysters.What pathogen probably caused the illness?
a) Norovirus
b) Shigella spp.
c) Salmonella Typhi
d) Enterohemorrhagic and shiga toxin-producing E.coli
Answer:
a) Norovirus
Explanation:
Norovirus also known as winter vomiting bug is a very contagious virus. It causes vomiting, diarrhea and stomach pain. It can spread from eating contaminated food or by person to person. Oysters and other shell fish are very common agents of norovirus outbreaks. When they are exposed to untreated human sewage they come in contact with the virus. They filter sea water via their bodies to obtain food but norovirus is able to cross their bodies and accumulates inside them. Oysters are typically at more risk of transmitting the disease because they are eaten raw. To reduce the risk of norovirus shellfish should be cooked at a temperature of 145 degrees Fahrenheit.
A student formulated a hypothesis that cotton will grow larger bolls (pods) if magnesium is added to the soil. The student has two experimental fields of cotton, one with magnesium and one without. Which data should be collected to support this hypothesis?
Answer:
The comparison of the size between groups.
Explanation:
This is like a quasi experimental design, where you need to compare the two groups after you apply the stimulus to the experimental group.
To do this comparison you need to collect the size measurement data, that's when you're gonna support your hypothesis or not. Why size data between groups? Simply because your hypothesis is about larger growing cotton bolls, and that refers to size.
Which of the following is true of the blood-brain barrier? a. The barrier is formed by cells that line the capillaries of the brain. b. The barrier is uniform, protecting all brain structures. c. The barrier functions to regulate the chemical composition of the extracellular fluid surrounding the brain cells. d. The barrier pumps glucose out of the brain into the bloodstream.
Answer:
The barrier functions to regulate the chemical composition of the extracellular fluid surrounding the brain cells.
Explanation:
Blood-brain barrier
It is a very selective semipermeable membrane , hence allow some specific substance to pass via it . This barrier separates the extracellular fluid in the central nervous system and the circulating blood from the brain .
The barrier is composed of the endothelial cells .
Passive diffusion is shown in this system , and allows molecules like the water , glucose , amino acid to pass .
It regulates the chemical composition of the fluid of brain cell .
The blood-brain barrier, formed by cells lining the brain's capillaries, functions to regulate the chemical composition of the extracellular fluid surrounding brain cells, and isn't uniformly protecting all brain structures. Its primary role is not to pump glucose out of the brain into the bloodstream.
Explanation:The blood-brain barrier (BBB) is crucial to the health and function of the Central Nervous System (CNS), notably the brain and spinal cord. Rooted in its unique arrangement of blood vessels, the BBB holds strict control over what can move out of the circulatory system and into the CNS, shielding it from toxins or pathogens that may be present.The barrier is indeed formed by cells lining the capillaries of the brain, primarily endothelial cells form tight junctions, limiting the transfer of blood components to the brain. This excludes most microbes, hence there is no normal microbiota in the CNS. Furthermore, the blood-brain barrier also functions to regulate the chemical composition of the extracellular fluid enveloping the brain cells, not to pump glucose out from the brain into the bloodstream.
However, it's not accurate that the BBB is uniformly protecting all brain structures. Certain areas of the brain, like the choroid plexus and parts of the hypothalamus, have a more permeable barrier to allow specific molecules to pass through.
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You hang a microscope slide from a submerged, L-shaped PVC pipe in lake water that is 2 feet deep. The slide hangs 6 inches below the surface of the water and remains there for eight weeks. When you remove it and bring it to your lab for observation, you see that algae, bacteria, and even some fungi have colonized the slide. You determine that you are looking at a(n)
Answer:
The correct answer is a biofilm.
Explanation:
A collection of one or more kinds of microbes, which can grow on various distinct surfaces is considered as a biofilm. The microbes, which produce biofilms comprise fungi, bacteria, and protists. One prime illustration of a biofilm is a dental plaque, that is, a slimy accumulation of bacteria, which develops on the surface of teeth.
Final answer:
The colonization of algae, bacteria, and fungi on the microscope slide that was submerged in lake water for eight weeks indicates the observation of a biofilm.
Explanation:
The colonization of algae, bacteria, and fungi on the microscope slide that was submerged 6 inches below the surface of the water in a lake for eight weeks indicates the observation of a biofilm. A biofilm forms when planktonic bacteria adhere to a surface and produce slime, resulting in the formation of a colony. In this case, the water's dissolved organic carbon (DOC) and larger particles contributed to the growth of biofilm and prevented algal blooms.
Two organisms live in the same geographical area, are very similar genetically, and can breed with each other successfully. Which of the following statements is correct?
a. These organisms have undergone natural selection.
b. These organisms are members of different populations.
c. These organisms are members of the same species.
d. These organisms have gone extinct.
Answer: Option C
Explanation:
When two genetically similar species can breed among each other in order to produce a fertile offspring then it is known as members of same species.
The offspring that is produced must be fertile in order to extend the members in the same species.
Two organism can breed because they are genetically similar and the similarity allows the organism produces a fertile offspring.
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PICTURE IS THE QUESTIONNN? THE PICTURE/SCREENSHOT is the questions and Question 1 has a picture to the question.
here are the answer choices if you can see them.
Question 1: A scientist observed that during the course of a chemical reaction in a tissue culture of animal muscle cells, the number of ATP molecules produced was greatly reduced. What did the scientist most likely hypothesize from the observation?
a
oxygen availability became limited
b
oxygen availability increased
c
carbon dioxide availability increased
d
carbon dioxide availability became limited
Question 2: Cells store energy when?
a
the third phosphate group breaks off from an ATP molecule.
b
a third phosphate group is bonded to an ADP molecule
c
they break down sucrose to glucose and fructose.
d
ions are released into the bloodstream.
Q1= the answer I think should be A
Q2= the correct answer B
Answer:
The correct answer will be option-
1. Option-A
2.Option-B
Explanation:
Case I
The production of ATP molecules in the animal cell takes place through a complex process called cellular respiration. The cellular respiration leads to the breakdown of the glucose molecule in the presence of oxygen which is utilized as an electron acceptor in the electron transport chain.
Since the ATP level decreased in the tissues indicated that the tissues are not getting enough oxygen molecule. Thus, option-A is the correct answer.
Case II
The cells store the energy molecule in the form of the ATP molecule which is formed by Phosphorylation or adding the phosphate group to the ADP molecule in the presence of energy provided by the movement of H⁺ ions.
Thus, Option-B is the correct answer.
Pesticide use ________.
a) may be a necessary part of modern technological agriculture
b) can be eliminated by changing the season when crops are planted
c) will be eliminated as pests decrease as a consequence of years of pesticide use
d) poses no environmental threat in this country
e) will not be a problem as we learn to genetically modify predators
Answer: Option A.
Explanation:
Pesticide are defined as the substances which are used to control pests, and weeds in agricultural practices. Herbicide, insecticides, nematicide and fungicide are the examples of pesticides.
Now a days use of pesticide has become a necessary part of modern technological agriculture. Agricultural technology has evolved a lot from past and several benefits of pesticides are found that affect production and quality of crops. Other advantages of pesticides that makes its use necessary includes improve economic status of countries due to increases in yield using pesticide that reduces pests effect on yield; pesticides undergo photochemical transformation and produces metabolites which are non-toxic to human health and the environment; and Insecticides are used to control the insects which caused diseases like malaria.
Hence, the correct option is A.
Final answer:
Pesticide use a) may be a necessary part of modern technological agriculture.
Explanation:
The correct answer to the question about pesticide use is that it a) may be a necessary part of modern technological agriculture. Pesticides play a crucial role in controlling crop pests, which are mostly insects, and can significantly increase agricultural productivity when initially applied. However, over time, pesticides become less effective as pest populations evolve resistance. There's also the consideration of their impact on non-target species, including beneficial insects like honeybees, and environmental pollution affecting other ecosystems. Despite these concerns, the complexities of agriculture make the use of pesticides a continuing reality, although practices such as increasing landscape complexity to support natural pest enemies and reducing pesticide use can help mitigate some of the negative effects.
The names of muscles often indicate the action of the muscle. What does the term levator mean?
A. The muscle flexes and rotates a region.
B. The muscle elevates and/or adducts a region.
C. The muscle functions as a synergist.
D. The muscle is a fixator and stabilizes a bone or joint.
Answer:
The right answer is B. The muscle elevates and/or adducts a region.
Explanation:
Levator muscles are the muscles use to raise any region of the body. Like levator anguli oris which elevates the corner of the mouth, levator ani which is made up of many muscle sheets of iliococcygeus, puboretalis, and pubococcygeus muscles and holds pelvic viscera in their place.
Levators costarum during breathing helps in raising the ribs, levator palpebrae superioris have function in raising the eyelids and there are so many levator muscles are present in different places in the body which helps to elevate and/or adducts a region.
Therefore, the right answer is B. The muscle elevates and/or adducts a region.
Raven has just finished learning a list of nonsense words given to her by her psychology instructor as part of a class activity. She had 100 percent recall at the end of class. According to Ebbinghaus’s curve of forgetting, how quickly will Raven likely forget about 40 percent of the information she has just learned?
a. within the rst 20 minutes after leaving the classb. within the rst day after leaving the classc. nearly a week after the classd. nearly a month after the class
Answer:
Option (a).
Explanation:
Ebbinghaus Forgetting Curve may be defined as the curve that are used to determine the decreases ability of the brain to memorize the thing. This was first hypothesized by Ebbinghaus.
The ability of memorize the things will depend upon the individual and on the strength of the memory. As Raven was 100% recall the the end of class, she can forget the 40% memory by leaving at the rest 20 minutes after the class. The memory retain with her long that gas the high strength.
Thus, the correct answer is option (a).
Question 7
A reaction between an acid and a base that produces a salt and water is a(n)_____ reaction.
A)neutralization
B)synthesis
C)decomposition
D)endpoint
Answer:
Neutralization
Explanation:
Neutralization, there is nothing much to add. Neutralization is the reaction of an acid and a base. A typical acid is HA and a typical base BOH the reaction is:
HA + BOH -> H2O + BA
H2O is water
BA is the salt
Answer:
A reaction between an acid and a base that produces a salt and water is a neutralization reaction. Hence the answer is option A.
Explanation:
A neutralization reaction is defined as when a chemical utilize the other chemical during the course of reaction. In this case the acid utilizes the base and the base neutralizes the acid. During the course of reaction the salt is formed and the salt is deposited in the base of the container.
Acid can turn blue litmus into red whereas a base can turn red litmus paper into blue. According to the pH value of acid is defined as whose value is is less than 7 and a base is defined as whose value is more than 7 up to 14.
The "Bateman gradient" states that males have more variable reproductive success than do females, since males can mate with many females while females are limited by the number of eggs they produce. This explains why the male Idaho ground squirrel follows his mate everywhere. True or False
Answer:
False
Explanation:
The Given statement of False. As The "Bateman gradient" states that males have more variable reproductive success than do females, since males can mate with many females while females are limited by the number of eggs they produce. This is false statement. This does not explain why the male Idaho ground squirrel follows his mate everywhere.
A truck carrying petroleum collided with a tree and has been leaking gas since the collision. Ecologists suggest the use of microorganisms to prevent soil pollution due to the leakage. Which method are the ecologists suggesting should be used?
Answer:
The method ecologists are suggesting is bio-remediation.
Explanation:
The treatment of contaminated or polluted areas such as any surface material, water or soil by using microorganisms is termed as bio-remediation. The microorganisms tend to degrade the pollutants. Also, the method of bio remediation is cheaper then any other alternative methods. Another subtle advantage of using the method of bio remediation over other methods is that the microorganisms can be genetically engineered to degrade certain type of pollutant.
Homeostasis is the maintenance of internal consistency. It’s a common principal in all living things and extends to pH. In a living system, what helps the organism maintain its pH homeostasis?
Answer:
Buffer systems
Explanation:
Living organisms maintain constant pH of both extracellular and intracellular fluids. The human body also maintains the pH of blood within the narrow range of 7.35 to 7.45. This is achieved with the help of buffer systems. Buffers are the chemicals that convert the strong acids or bases into their weak counterparts by removal or addition of protons.
For example, carbonic acid–bicarbonate buffer system of the human body wherein the bicarbonate ions serve as weak bases while the carbonic acid serves as a weak acid.
Under the conditions of higher H+ concentrations, the bicarbonate ion of the buffer system serves as a weak base and accepts the excess of the H+ to restore the normal range.
3. What 20th century discovery has been instrumental to the field of genetic engineering by allowing researchers to cut and splice specific DNA fragments into microorganisms?
a) Small RNAs
b) Restriction enzymes
c) Ribozymes
d) The microbiome
Answer:
b) Restriction enzymes
Explanation:
Restriction enzymes are the endonucleases that recognize and cut the specific DNA sequence and breakdown the DNA into smaller fragments.
With the discovery of these enzymes, it became possible to cut the genome of microbes or any other organism at the specific site.
For example, the restriction sequence for the restriction enzyme EcoRI is 5' GAATTC 3' on one strand and it cuts between G and A of the sequence and between A and G on the complementary strand.
Although he gave minilessons on using text factors, a teacher found that his students were still not internalizing and applying this information. Of the following, the best way to help students internalize the information would be for the teacher to:A) place the students in literature circlesB) demonstrate with a think-aloudC) require students to read nonfiction booksD) provide more time for sustained silent reading
Answer:
The correct answer is option B) "demonstrate with a think-aloud".
Explanation:
Think-aloud literally means to say one thoughts, expecting to other people would hear them. The strategy of describing the thoughts is very helpful for a teacher to achieve that his students internalize the information that is being given. If the teacher uses this approach, the student could see the teacher's perspective and would know what the teacher is thinking when he is using text factors. In consequence, the next time the student tries to use text factors she or he would know for certain what is the teacher approach.
You do a gram stain of an unknown bacterium and the teacher guarantees you that is it a member of family Enterobacteriaceae. However, your cells come out purple. What other clue might indicate that you do have a member of that family of bacteria?
a. tiny cocci bacilli in chains
b. tiny bacilli
c. rod-shaped cells with endospores
d. curved rods.
Answer:
The correct answer is c. rod-shaped cells with endospores
Explanation:
Most members of family Enterobacteriaceae can appear pink after gram staining due to porous membrane like Zymophilus, Pectinatus etc. Most of them form endospores which is a very tough outer covering formed by cells to resist the adverse condition. Many members of these family resides in intestine of animals and helps in food digestion.
These bacteria comes under phylum Firmicutes and mostly are rod shaped(bacillus). So when most of cells comes out purple the rod shaped cells with endospores indicates that gram stain contains the member of family Enterobacteriaceae.
The correct option is b. tiny bacilli clue might indicate that you do have a member of that family of bacteria.
When performing a Gram stain, members of the family Enterobacteriaceae are typically Gram-negative bacteria, which means they should appear pink or red under the microscope after the staining process. However, if the cells come out purple, it suggests that they have retained the crystal violet dye, which is characteristic of Gram-positive bacteria. This could be due to improper staining technique or the presence of a Gram-variable organism.
Despite the unexpected Gram stain result, the teacher's guarantee that the bacterium is a member of the family Enterobacteriaceae can be supported by other characteristics:
a. Tiny cocci bacilli in chains: This description does not match the typical morphology of Enterobacteriaceae, which are usually rod-shaped.
b. Tiny bacilli: This option is consistent with the typical morphology of Enterobacteriaceae, which are small rod-shaped bacteria.
c. Rod-shaped cells with endospores: While some rod-shaped bacteria form endospores, members of the family Enterobacteriaceae do not typically produce endospores.
d. Curved rods: This morphology is more characteristic of other bacterial families, such as the Vibrionaceae family, not Enterobacteriaceae.
Therefore, the presence of tiny bacilli (option b) would be a clue indicating that the bacterium is indeed a member of the family Enterobacteriaceae, despite the Gram stain result. It is important to consider other morphological and biochemical characteristics when identifying bacteria, especially when there is a discrepancy in staining results.
What heart problem would be experienced by an individual whose ECG is seen at C?
a. ECG tracings showing normal and various abnormal rhythms.
b. The atria are not pumping blood.
c. The ventricles are not reaching systole in every cardiac cycle.
d. The heart is not pumping any blood at all.
e. The heart would pump with too much pressure (hypertension).
Answer:
The ventricles are not reaching systole in every cardiac cycle.
Explanation:
The mucosa of the appendix contains masses of lymphoid tissue (MALT) and therefore leukocytes capable of attacking bacteria are present in the appendix. During appendicitis, bacteria trapped in the lumen of the appendix are not effectively attacked because ______.
Answer: There is an inadequate blood supply to the appendix wall
Explanation: The appendix is a tube-shaped sac that's attached to the large intestine. It exists in humans and a small number of other mammals, including the koala and apes. In medical terms, it’s referred to as 'vermiform appendix' for its thin, worm-like shape.
According to researchers, the human digestive system is full of bacteria necessary to digest food. [1] When attack from diseases, sometimes these important kinds of bacteria are purged or killed off. In such situations, the appendix can act as a reserve for good bacteria. After the immune system beats off the disease, the bacteria emerge and re-colonize the gut.
During appendicitis, bacteria trapped in the lumen of the appendix are not effectively attacked because of the inadequate blood supply to the appendix wall. Therefore leukocytes are not able to migrate to the site of infection to attack the bacteria.
Bacteria trapped in the lumen of the appendix during appendicitis aren't effectively attacked because inflammation and swelling from the resulting inflammatory response create a physical obstacle that interferes with the immune response. This is despite the appendix housing the mucosa-associated lymphoid tissue (MALT), a critical component of the immune system that typically aids in fighting off bacteria.
Explanation:During appendicitis, bacteria trapped in the lumen of the appendix are not effectively attacked because the resultant inflammation and swelling can create a physical barrier that hinders the circulation of leukocytes and the conduction of the immune response. The mucosa-associated lymphoid tissue (MALT) in the appendix forms an integral part of the immune system, housing leukocytes that attack bacteria. Specialized endothelial cells, known as M (or microfold) cells in MALT, typically transport materials from the intestinal lumen to neighboring follicles to instigate immune responses against potential pathogens.
However, in the case of appendicitis, a blockage in the lumen can trigger these cells to incite an inflammatory response instead. That can lead to the appendix swelling, essentially creating a physical barrier that prevents leukocytes from effectively reaching and attacking the trapped bacteria.
Furthermore, this situation can be exacerbated by the presence of copious blood and lymphatic vessels in the lamina propria (the tissue layer beneath the MALT). When these vessels react to the inflammation by dilating and becoming permeable, tissue edema can ensue, further compromising the immune response.
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Identify the statement about digestion of DNA by restriction enzymes that is NOT true.
a. It generates restriction fragments.
b. It produces blunt ends. It produces sticky ends.
c. One strand of the DNA molecule is cut.
d. All of the answer choices are correct.
Answer:
c. One strand of the DNA molecule is cut.
Explanation:
Restriction enzymes or RE cut both strands of a DNA molecule, generating restriction fragments with sticky or blunt ends. These enzymes can cut in more than one place in the chain.
A RE creates 2 or more restriction fragments if it cuts in at least 1 place of a linear DNA nolecule or in 2 or more places of a circular DNA molecule.
Final answer:
The incorrect statement is option c, as restriction enzymes cut both strands of the DNA, either producing sticky ends with overhangs or blunt ends with no overhangs, facilitating the recombination of DNA fragments.
Explanation:
The statement about the digestion of DNA by restriction enzymes that is NOT true is option c: One strand of the DNA molecule is cut. Restriction enzymes, by nature, cut both strands of the DNA molecule. Some restriction enzymes make staggered cuts in both strands, producing "sticky ends" that have overhanging single-stranded DNA, while others produce a straight, or blunt, cut across both strands, leaving behind "blunt ends". Both mechanisms are designed to allow easier recombination of DNA fragments. For example, the enzyme BamHI cuts at specific recognition sites to produce sticky ends, and HaeIII cuts to produce blunt ends. The process enables the production of recombinant DNA by joining DNA fragments from different sources, which are cut with the same enzyme, thereby ensuring that the ends of the fragments can ligate.
What are the two major factors determining the distribution of terrestrial biomes?temperature and light temperature and rainfall light and rainfall plants and animals temperature and plants
Answer:
Temperature and light
Explanation:
This two factors are determinants in terrestrial biomes, because the temperature is closely related to rainfall, to the formation of glaciers, to the migration of species. And the light is related from the use of these reay by the plant, through the greenhouse effect. This two make the biodiversity to be what it are
In fruit flies, an autosomal mutation in the gene for wing veining results in cross veinless wings. This mutation is recessive. At another gene, an autosomal recessive mutation results in white eyes. Which of the following indicates the genotype of an individual heterozygous at both loci?
A. CV+CV W+ W
B. cv+cv w+w
C. v+v r+ r
D. V+V R+R
Answer:
B. cv+cv w+w
Explanation:
Fruit flies have a special nomenclature to write the genotype of individuals.
If the mutation is recessive, you have to write it with lowercase letter(s).If the mutation is dominant, you have to write it with capital letter(s).Wild-type alleles are indicated with a superscript plus (+).In this problem, both crossveinless (cv) and white (w) mutations are recessive.
For that reason, a heterozygous individual's genotype for both genes will be written as:
cv⁺ cv w⁺ wThe genotype of an individual fruit fly heterozygous at both loci for veinless wings and white eyes would be represented as 'cv+cv w+w'. This individual carries one dominant and one recessive allele for each trait, meaning the dominant traits of normal wing veining and normal eye color would be expressed.
Explanation:In genetics, the term heterozygous refers to an individual having two different alleles for a particular gene. In the case of fruit flies, the genotype of an individual heterozygous at both loci means carrying one dominant and one recessive allele for each mutation: one for the veinless wing characteristic and another for the white eyes characteristic.
The correct answer to the given question would therefore be B. cv+cv w+w. Here, 'cv+' and 'w+' denote the dominant alleles for the normal wing veining and eye color, respectively, while 'cv' and 'w' refer to the recessive alleles that lead to veinless wings and white eyes, respectively. Given that both are recessive traits, each needs a double dose of the respective mutated gene to express itself, so a heterozygous fly would not show either trait.
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A geologist discovers that the number of fossils of a single species decreases significantly in higher rock layers compared to deeper rock layers. Which conclusion can best be drawn from this evidence?
Answer:
The species became less abundant
Explanation:
If the species decreases it doesn't necessarily means it has become extinct.
Answer:
This means that the number of individuals of this species has decreased over time.
Explanation:
When a rock is formed in one place, it goes through a process called weathering, which causes this rock to create layers over time. The deeper the layer, the older it is, on the other hand, the more superficial layers are younger. This is very important when cinetistas want to know how the population of a given species has increased or decreased over the years.
This occurs by visualizing the amount of fossils in each layer of the rock. If scientists can see that the number of fossils of a single species decreases significantly in the higher rock layers compared to the deeper layers, they can conclude that the number of members of that species has decreased over time.
What refers to the role of a species in it's ecosystem and often relates to what it eats or what consumes it?
Answer:
ANSWER : NICHE
Explanation:
The particular role of a species or organism in its comprising ecosystem is termed as niche. Niche refers to every way that a specie interacts with its environment included both the biotic components as well as the abiotic components. Niche describes how well an organism is adapted for a particular environment. It tells us how well a species is for competing for food and other resources in that environment and how it is better for that environment.
Which of the following occurs in situations where more than one hormone produces the same effects at the target cell and their combined effects are amplified?
A. synergismB. antagonismC. summationD. permissiveness
Answer:
The correct answer will be option-A.
Explanation:
Hormones act on the target cells of the body in two ways: antagonism and synergism.
The synergism is the condition when two or more hormones act on the same target cells to produce more strong and amplifies results than they achieve individually. The most common example of synergism in the body is the effect of the follicle-stimulating hormones (FSH) and testosterone on sperm production.
Thus, option-A is the correct answer.
How many ATP are generated in the electron transport chain?
o2
O4
32
36
Answer:
32
Explanation:
what is fetch, definition???
Answer:
achieve when sold
Explanation:
QUESTION 20
The strength of a base that only partly ionizes in solution would be described as _____.
A)dilute
B)concentrated
C)weak
D)strong
A base that partly ionizes in a solution is described as a weak base (option C), distinct from a strong base that ionizes almost completely.
The strength of a base that only partly ionizes in solution would be described as weak (option C). This is because a weak base is one that does not completely dissociate into its ions in solution. The key distinction between a weak base and a strong base is the degree of ionization. A strong base dissociates almost completely when dissolved in water, while a weak base only does so partially. Whether a solution is dilute or concentrated refers to the amount of solute in the solvent, and not the intrinsic strength of the acid or base.
Cells contains parts known as organelles. These parts are specialized. What does that mean
Answer:
The answer below
Explanation:
What means that organelles are specialized?
Cells contains several kinds of organelles which help it to accomplish all the functions the cell needs. The cell is similar to us, we have different organs to do all our functions, the organelles are specialized in different activities to do all the functions the cells needs to be healthy. For example it has a membrane to protect and isolate from the environment, it has several mitochondria to generate energy or it has a nucleus to control all the activities. If the organelles weren't specialized, the cell couldn't accomplish all its functions.
Specialization refers to the process by which a structure becomes differentiated for a particular function. When a female ovum is fertilised by sperm, a zygote is formed which grows by mitosis. As it grows into am embryo then foetus, these cells undergo specialization as they form different tissues and organs which all play different roles to ensure the proper functioning of the body. Similarly, as organs and tissues cells undergo further specialization, in terms of organelles. Each cell contains organelles which serve different purposes, the nucleus controls cellular activity, mitochondria provides energy in the form of ATP, cytoplasm which provides the environment for metabolic reactions and ribosomes for protein synthesis ( to name a few). Each organelle uniquely specialized for its intended purpose and all reliant on each other.
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