Answer:
True
Explanation:
It would break the natural order each row dying or having to adjust messing up another food chain
What statement best describes the conflict in this excerpt?
Read this excerpt from "Eleven".
Not mine, not mine, not mine, but Mrs. Price is already
turning to page thirty-two, and math problem number four. I
don't know why, but all of a sudden I'm feeling sick inside,
like the part of me that's three wants to come out of my
eyes, only I squeeze them shut tight and bite down on my
teeth real hard and try to remember today I am eleven,
eleven.
It is internal because Rachel is impatient about her
birthday
It is internal because Rachel fights against the urge to cry.
It is external because Mrs. Price is a challenging teacher.
It is external because Mrs. Price does not call on Rachel.
Mark this and retum
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Submit
What’s this
Answer:
internal cos she figts against the urge to cry
Explanation:
Answer:
I think the answer is c
Explanation:
I read the story
A vaccine contains
a) antigens
b) antibodies
c) antibiotics
d) enzyme inhibitors
Answer:
i believe your answer is c)antibiotics
Explanation:
Which bead phenotypes avoided predation best? Why do you think this phenotype performed better than the other?
Phenotype of the predators themselves avoid predation, which include their strong physical body structure, desire to make others prey.
Explanation:
Phenotype are the set of characteristics which are said to be seen in an organism. These are the observable kind of characteristics. Phenotype includes in them the physical form, structure or the morphology of the organism.
It also includes in the biochemical, physio social properties of the organism. The phenotype of the organisms which themselves are the predators are the ones responsible for avoiding their own predation.
A 26-year-old woman in the clinic today for her annual physical examination. As you take her medical history, it becomes apparent that she is quite concerned about her risk for developing breast cancer. Her mother and a maternal aunt both developed breast cancer in their late 40s. She has heard that genetic testing can be done to see whether she carries "breast cancer genes."
***Assuming J.F. is talking about the BRCA1 and BRCA2 genes, what is the role that these genes have in the genetic mechanisms of breast cancer? (select all that apply)
a. BRCA1 and BRCA2 are tumor suppressor genes.
b. BRCA1 and BRCA2 are tumor promoter genes.
c. BRCA1 and BRCA2 are oncogenes.
d. BRCA1 and BRCA2 are proto-oncogenes.
Answer: the correct option is A (BRCA1 and BRCA2 are tumor suppressor genes).
Explanation:
BRCA1 and BRCA2 genes( breast cancer genes) are both tumor suppressor genes in every human expressed in breast cells and other tissue cells and it helps in
- repairing damaged DNA,
- regulate cellular growth and
- suppress the development of tumors . BRCA1 is located in chromosome 17 while BRCA2 is located in chromosome 13.
These genes in relation to genetic mechanisms of breast cancer, can be tested to know the possibility of the patient being susceptible to breast cancer in future or not. Mutation in either BRCA1 or BRCA2 or even in both genes makes the woman have a higher risk of developing breast,
What does Vivian Lee research? *
Answer:
she was an actor
Explanation:
She starred in Gone With the Wind when she was 25. she was a actress
Marine debris is best described as being composed of
a. solid garbage
b. untreated sewage
c. toxic chemicals
d. things discarded by humans
Answer:
Solid garbage
Explanation:
Marine debris are artificial objects that are lost or thrown into the marine environment. Majority of these debris include plastic, glass, metal, fishing hook etc.
All these examples mentioned above can be classified as solid garbage.
Answer:
A. solid garbage
Explanation:
The corpus callosum
A. consists of a broad band of gray matter.
B. . is found at the base of the transverse fissure.
C. s a band of commissural fibers that connects the right cerebral hemisphere to the left cerebral hemisphere.
D. connects the frontal lobe to the occipital lobe.
E. connects the frontal lobe to the parietal lobe.
Answer:
The corpus callosum C. is a band of commissural fibers that connects the right cerebral hemisphere to the left cerebral hemisphere
Explanation:
The corpus callosum is the largest commissural tract in the human brain, it is not a broad brand of gray matter. It consists of about 200-300 million axons that connect the two cerebral hemispheres. So, as we can see, options D and E are incorrect because it does not connects the frontal lobe to the occipital lobe or to the parietal lobe. It is not at the base of the transverse fissure, as says option B, it is beneath the cerebral cortex in the brain.
Answer:
Option C
Explanation:
The Corpus callosum is also referred to as callosal commissure and is a wide, thick nerve tract made up of a flat bundle of commissural fibers that divides the cerebral cortex lobe into the right and the left hemispheres. It allows for communication/transfer of information between the two hemispheres. It is made up of white matter tissue
Why do some water masses in subsurface oceans have little or no oxygen? a. Large carnivores deplete oxygen in subsurface oceans via their high rates of oxygen metabolism. b. Rates of photosynthesis are low in overlying waters, limiting the availability of oxygen. c. Waters underneath the surface oceans are cold and thus have a limited capacity to carry oxygen in solution. d. Rates of photosynthesis are high in overlying waters, supporting high rates of respiration in waters that deplete the oxygen there.
Answer:
The Correct option is "D"
Explanation:
By and large there is accessibility of plenitude daylight on a superficial level which gives different tiny fish and diatoms a space to develop, which additionally accommodates thick algal sprout. These algal sprout are obtrusive to such an extent that their thickness may exhaust the oxygen level and furthermore can slaughter the microscopic fishes.
1. Discuss why you think the unit exercise only had you create two bones for the model’s hand rather than five? 2. How would rigging (and animation) be more difficult if you didn’t include guide bones, pole targets, and other rigging elements not directly part of the "skeleton" of the mesh? 3. Describe the ways your model originally looked "off" in either the deformation/skinning or in the actual animation/keyframing process. Also, explain specific ways that you fixed these deficiencies. 4. Imagine you were creating a robot instead of a human character. What design changes might you make to the model in terms of rigging and skinning to make the character more "robotic?" 5. How would you tackle the challenge of animating a "boneless" model such as, for example, a traditional RPG slime monster — or, alternatively, something like a snake or a detailed tail animation?
Answer:
1. Discuss why you think the unit exercise only caused you to create two bones for the model's hand instead of five.
R = why the prosthesis can be adapted according to the needs of each of the users.
2. How would the rigging (and animation) be more difficult if it did not include guide bones, pole targets, and other rigging elements that are not directly part of the mesh "skeleton"?
R = the bones of the fingers that are still present help us create the measurements of the missing fingers since in this way we create a more harmonic and sesthetic hand, and when these fingers are not present it is more difficult to create in the animation since it can be noticed a little deformed since the requests cannot be correct and the fingers can be seen in very different sizes from one to the other.
3. Describe the ways your model originally looked "off" in warp / skinning or in the animation / keyframe process
A = I would not know how to answer that because I do not have any key program to carry out the prosthesis but I can guide you a little bit about a prosthesis program which you can see in an animation program
The digital model of the affected hand was obtained using modeling techniques in Blender, Rhinoceros and Mesh to model conversion software in Solid Edge. As a result, a 3D digital model of the affected hand was obtained on which the mechanisms of the prosthesis to be implemented can be worked on and adjusted.
After developing the model of the prosthesis volume, measurements were taken and adjusted to the plaster model that was previously obtained. Figure 13 shows how the prosthesis model was fitted to the plaster hand model. Subsequently, with the measurements obtained from this model, the prosthesis mechanisms are designed for the three missing digits in the user's hand.
4. Imagine that you are creating a robot instead of a human character. What design changes could you make to the model in terms of rigging and skinning to make the character more "robotic"?
R = the physical aspect, and that the movements are more rigid and not so fluid to give the robotic touch, since currently robots move very fluidly and can make faster expressions and make it look more metallic and not treat it to do with such a humanoid aspect.
5. How would you face the challenge of animating a "boned" model, such as a traditional RPG slime monster, or alternatively a snake or detailed tail animation?
R = you have to make an animation character that looks gelatinous, as through the program you have to create a mass that looks translucent so that it can simulate that the character does not have bones, because if you make it a solid object we would be losing the effect that the character is gelatinous that is supported without bones.
Scientists use a hierarchical system to classify organisms.
The broadest categories of classification are known as Kingdoms.
Organisms in the Kingdom Monera, or Eubacteria and Archaebacteria, include those who
A. can move independently, such as animals.
B. reproduce by spores, such as mushrooms.
C.
lack a true nucleus, such as bacteria.
D. have a nucleus and chloroplasts, such as algae.
Answer:
lack a true nucleus, such as bacteria.
Explanation:
The Kingdom Monera, which is now split into the kingdoms Eubacteria and Archaebacteria, includes organisms who lack a true nucleus, such as bacteria. In Monerans, the genetic material is loose within the cell.
It is good practice to autoclave all cultures before disposal, even if the culture is of a non-pathogenic organism. Autoclaving not only kills the cells in the culture, but denatures and destroys proteins and nucleic acids. Based on what you have learned in this laboratory exercise, why is it especially important to autoclave genetically engineered organisms before disposal
Answer:
Most of the GMO are hazardous therefore inactivation of the GMO is very important , so that they are completely or partially destroyed before disposal. This is needed to provide high level of protection for the surrounding environment inhabited by man and other organisms to be deposited..
In all cases at least 99-100% inactivation must be achieved.
Explanation:
The major function of the respiratory system is to:
A. maintain the digestive system of the body so that it can continue to operate.
OB. give the heart the energy it needs to circulate blood.
O c.
provide oxygen to the body and eliminate carbon dioxide from the body.
OD. cleanse the body of toxins, poisons, and harmful chemicals.
Reset
Next Question
Answer:
provide the organism with the gases the cells need.
Explanation:
You are working in an outpatient clinic when a mother brings in her 20-year-old daughter, C.J., who has type 1 diabetes mellitus (DM) and has just returned from a trip to Mexico. She has had a 3-day fever and diarrhea with nausea and vomiting. She has been unable to eat and has tolerated only sips of fluid. Because she was unable to eat, she did not take her insulin as directed. You note C.J. is unsteady, so you take her to the examining room in a wheelchair. While assisting her onto the examination table, you note her skin is warm and flushed. Her respirations are deep and rapid, and her breath is fruity and sweet smelling. C.J. is drowsy and unable to answer your questions. Her mother states, "She keeps telling me she's so thirsty, but she can't keep anything down."
Required:
List four pieces of additional information you need to elicit from C.J.'s mother.
Answer:
The additional questions are listed in the explanation
Explanation:
1. For how long has C.J. been drowsy
2. What have C.J.'s blood glucose levels been running?
3. How much fluid has C.J. been able to keep down over the past 3 days?
4. How often has C.J. been vomiting over the past 3 days?
In the case of C.J., a 20-year-old with type 1 diabetes mellitus presenting with signs of possible diabetic ketoacidosis, it is critical to obtain information on the duration and control of her diabetes, changes to her insulin regimen, the timeline of her symptoms, and any past DKA episodes or hospitalizations.
You are dealing with a case of a 20-year-old patient, C.J., who has type 1 diabetes mellitus (DM) and is presenting with fever, diarrhea, nausea, vomiting, and signs of dehydration and potential diabetic ketoacidosis (DKA), given the fruity, sweet-smelling breath (a sign of ketosis). In order to provide the best care for C.J., there are several pieces of additional information that would be crucial to elicit from her mother:
The duration of diabetes and the control level of C.J.'s diabetes prior to this incident.Any recent changes to C.J.'s insulin regimen, including the doses and types of insulin she uses.Details of her symptoms timeline, especially the onset of the fever, vomiting, and diarrhea, to better understand the progression of her current condition.Any prior episodes of diabetic ketoacidosis (DKA) or hospitalizations related to her diabetes, to assess her risk and previous management strategies.What are some plants that grow in mountains
Answer:
Trees & Shrubs
Explanation:
For Mendelian traits, ALL members of the F1 generation are expected to resemble the parent with the dominant trait. For cytoplasmic traits, the members of the F1 generation are expected to resemble the mother, with potential for variation due to the genetics of the cells from which the eggs developed.True/False
Answer:
True
Explanation:
Mendel's law of dominance states that in a hetero-zygote, one trait will conceal the presence of another trait for the same characteristic. Rather than both gene contributing to a phenotype, the dominant allele will be expressed exclusively
In case of cytoplasmic inheritance, distinct maternal effects are observed. There is more contribution of cytoplasm to the zygote by female parent than male parent and we know generally that ovum contributes more cytoplasm to the zygote than sperm.
Put the following steps in the correct order from 1-9
polypeptide chain is released from the P site
small ribosomal subunit binds to mRNA
initiation complex formed with addition of large ribosomal subunit
ribosomal subunits dissociate
codon recognition (non-initiating site)
translocation
transcription of mRNA from DNA
peptide bond formation
ribosome reads a stop codon
Answer:
transcription of mRNA from DNA
small ribosomal subunit binds to mRNA
initiation complex formed with addition of large ribosomal subunit
translocation
codon recognition (non-initiating site)
peptide bond formation
ribosome reads a stop codon
polypeptide chain is released from the P site
ribosomal subunits dissociate
Explanation:
The above describes the process of translation in the ribosome. After transcription of DNA to mRNA, the mRNA is taken to the ribosome to undergo translation, here the mRNA binds to the small ribosomal subuits and to other initiation factors; binding at the mRNA binding site on the small ribosomal subunit then the Large ribosomal subunits joins in.
Translation begins (codon recognition; initiating site) at the initiation codon AUG on the mRNA with the tRNA bringing its amino acid (methionine in eukaryotes and formyl methionine in prokaryotes) forming complementary base pair between its anticodon and mRNA's AUG start codon. Then translocation occurs with the ribosome moving one codon over on the mRNA thus moving the start codon tRNA from the A site to the P site, then codon recognition occurs (non-initiating site again) which includes incoming tRNA with an anticodon that is complementary to the codon exposed in the A site binds to the mRNA.
Then peptide bond formation occurs between the amino acid carried by the tRNA in the p site and the A site. When the ribosome reads a stop codon, the process stops and the polypeptide chain produced is released and the ribosomal subunits dissociates.
Based on the article, which tissue do you think is affected by polio?
Answer:
Nerve
Explanation:
Answer: NERVE
Explanation:
Two cells in the same organism differ only in the number of chloroplasts they contain. The first cell has multiple chloroplasts, and the second cell has very few. What would most likely characterize these cells?
A. There would be no difference between the functioning of the cells because the chloroplasts are not essential cell structures.
B. The second cell would become larger because it would have fewer chloroplasts regulating its size and shape.
C. The second cell would shrink because it would not be able to store water and maintain cell shape.
D. The second cell would not be able to produce as much food because it could not capture sunlight.
Answer: D
Explanation: there right i just need the points
The correct answer is D. The second cell would not be able to produce as much food because it would not be able to capture sunlight.
What is the reason for chloroplasts being necessary ?Chloroplasts are essential for photosynthesis, in which plants and other photosynthetic organisms use sunlight to convert carbon dioxide and water into oxygen and sugars.
Without chloroplasts, the second cell would not be able to capture sunlight and convert it into energy, and therefore would not be able to produce as much food as the first cell.
A is incorrect because chloroplasts are necessary for photosynthesis and are therefore important cell structures. B is incorrect because the number of chloroplasts does not directly affect cell size.
C is incorrect because the number of chloroplasts has nothing to do with a cell's ability to retain water and maintain its shape. The photosynthesis is all done in the chloroplasts where the leaves are having the cells where the photosynthetic units.
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How many microhabitats
can trees have?
A. Trees do not have microhabitats
B. Trees can only have one
microhabitat
C. Trees can have multiple
microhabitats
Answer:
C.Trees can have multiple microhabitats
Answer:
C
Explanation:
Which of the following illustrates intraspecific competition? A sea gull swooping down to snatch a fish from the water's surface Male red-winged blackbirds defending limited nesting sites from other males A butterfly feeding on the nectar of a daffodil flower A tick and a flea sharing a dog's back
Answer: Male red-winkled black birds defending limited nesting sites from other males.
Explanation: Intraspecific competition is defined as a competition between two individuals from the same species. There are two types of intraspecific competition which are interference intraspecific competition and exploitation intraspecific competition. For the purpose of the answer provided above, interference intraspecific competition is discussed.
In interference intraspecific competition, the species establish hierarchies through aggressive behavior in which one or more individuals within the population holds a dominant status over the others. These individuals limit or prevent access of more subordinate individuals to a resources through direct interactions.
Here, only those individuals who are dominant or holds territories will increase their production success. Example of this is in when two winkled black birds establishes a territory of nesting sites, thus limits the access of this nesting sites thereby defending the nesting sites from other males.
Final answer:
The scenario that best illustrates intraspecific competition is 'Male red-winged blackbirds defending limited nesting sites from other males,' as it involves competition among members of the same species, which defines intraspecific competition.
Explanation:
Intraspecific Competition Illustrated
Among the provided scenarios, the one that illustrates intraspecific competition is: Male red-winged blackbirds defending limited nesting sites from other males. This is because the competition is occurring between members of the same species, which is exactly what intraspecific competition entails. Male red-winged blackbirds will aggressively defend their nesting areas to ensure that they have a place to attract mates and raise their offspring. This competition over resources—like territory—results in natural selection, improving the species' adaptations over time.
On the other hand, interspecific competition happens when individuals from different species compete for resources. This can lead to one species out-competing the other, potentially causing the less adapted species to move away, adapt through character displacement, or go extinct due to reproductive and survival disadvantages.
The competitive exclusion principle further explains this phenomenon, stating that two species competing for identical resources cannot coexist at constant population values; one species will out-compete the other. These types of competition are significant evolutionary forces that impact biodiversity and ecosystem structure.
Which of the following statements are true about the impact of competition and environmental filtering on community structure. A. Competition shapes a species fundamental niche B. Phylogenetic clustering and increased niche overlap occur when environmental filtering dominates C. Phylogenetic overdispersion and decreased niche overlap occurs when competition dominates D. Both competition and environmental filtering shape community structure
:
D. Both competition and environmental filtering shape community structure.
Explanation:
Based on competition theory, two organisms occupying the same ecological niche can only coexist provided there is spatial or conditioning niche partitioning.This prevent competitive exclusion , ensuring survival of the two species in their niche. Since the two species developed greater variability in (over-dispersed traits) to resist the selection pressure,(competition).Many overdisperesed traits is present in the communities.
However environmental filtering, is concerned with selection of species with natural ability or triats to survive in a given communities,Thus if two species of organism meet the same ecologocal requirements in a community, environmental filtering, fitters them and ensure their survival ahead of others who do not meet the requirements, and could not survive.
Thus the simultaneous operation of theses two opposing selection pressures, structured communities ensuring coexistence and favoured ability of organism to survive.
12. When a plant grows on the shade
i dont understand the question
The discovery, characterization, and the application of the CRISPR/CAS system has revolutionized the study of genetics and genetic engineering. Please select all correct answers regarding its mechanism of action and application. Multiple correct answers are possible, and partial credit will be given.
A. CRISPR sequences in bacteria resemble those from bacteriophage and plamid DNA.
B. For reverse genetics studies, CRISPR/CAS can be used to replace wildtype alleles with mutant alleles which can knockout the function of the target genes.
C. CRISPR is a DNA sequence in the bacterial chromosome.
D. The guide RNA directs CAS to specific DNA sequences.
E. The CRISPR/CAS system was discovered in bacteria, and its natural function is the equivalent of an immune system in bacteria for "remembering" viral infections and for attacking viral DNA in future infections.
Answer:
A. CRISPR sequences in bacteria resemble those from bacteriophage and plasmid DNA. (The CRISPR sequences are derived from previously invading bacteriophages and pladmids.)
B. For reverse genetic studies, CRISPR /CAS can be used to replace wild type alleles with mutant alleles which can knock out the function of target genes. (CAS 9 introduces double strand break (DSB) in the target sequence which is then repaired by non homologous end joining (NHEJ). NHEJ causes deletion, insertion or frame shift mutation leading to knock out of the target genes.)
C. CRISPR is a bacterial sequence in the bacterial chromosome. ( The sequences are derived from bacteriophages that had infected the bacteria defore.)
D. The guide RNA guides CAS to specific DNA sequences. ( The guide RNA directs CAS nuclease to the target sequences for editing.)
E. The CRISPR/CAS system was discovered in bacteria, and it's natural function is the equivalent of an immune system in bacteria for remembering viral infections and for attacking viral DNA in future infections. (The CRISPR/CAS system provides acquired immunity to bacteria.)
Explanation:
see answer
Centrifugation of a cell results in the rupture of the cell membrane and the compacting of the contents into a pellet in the bottom of the centrifuge tube. Bathing this pellet with light yields metabolic activity, including the production of large amounts of NADPH and ATP. One of the contents of this pellet is most likely which of the following
A: Cytosol
B: Thylakoid/chloroplasts
C: Lysosomes
D: Golgi bodies
Answer:
B: Thylakoid/chloroplasts
Explanation:
Chloroplasts convert sunlight into food by photosynthesis, this process generates Adenosine Triphosphate (ATP) and Nicotinamide adenine dinucleotide phosphate (NADPH), thereby it is expected to find these compounds in the pellet
The process described in the question suggests photosynthesis is happening, which is performed by the chloroplasts/thylakoids (option B). These parts of the cell absorb light energy to produce ATP and NADPH which facilitates sugar synthesis.
Explanation:The process described in the question involves metabolic activity, including the production of NADPH and ATP, triggered by exposure to light. This is indicative of photosynthesis, a process primarily carried out in thylakoids, which are part of chloroplasts. So, the most likely content of the pellet is option B: Thylakoid/chloroplasts. These structures contain chlorophyll, the pigment required for photosynthesis, and are distinct to plant cells and some other organisms. They absorb light energy to produce ATP, which is used in the process of creating sugars and other organic compounds.
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We are all born as naturalists eager to explore the world through our senses.
True
Fals
Answer:
That is false because some people are blind, or deaf,
Explanation:
What are the differences between the questions scientists and bioethicists try to answer?
Answer:
Scientists seek to understand phenomena in the world -they want to describe what it is- while bioethicists seek to figure out what people should do.
Scientists and bioethicists both ask questions that relate to biological topics, but their focus and approach differ. Scientists focus on investigating biological phenomena through empirical methods, while bioethicists explore the ethical implications of these phenomena.
What scientists seek to answer questions?Scientists seek to answer questions that relate to the natural world, such as how biological processes work, how diseases develop, and how to develop new treatments.
They use experiments, observations, and other methods to gather data and test hypotheses. Their research may involve studying living organisms, molecules, or cellular processes.
Bioethicists, on the other hand, explore the ethical implications of biological research and medical treatments. They may ask questions such as: Is it ethical to use genetic engineering to create "designer babies"? What are the ethical implications of animal testing in medical research? Should terminally ill patients be allowed to end their own lives? Bioethicists may consider cultural, social, and religious beliefs, as well as legal and policy issues when addressing these questions.
In summary, scientists focus on understanding natural phenomena through empirical research, while bioethicists explore the ethical implications of biological research and medical treatments.
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Nijmegen breakage syndrome is a human disease that is characterized by immunodeficiency, cancer predisposition, and microcephaly. It is a disorder that is caused by the inheritance of two mutant copies of a gene called NBS1, whose product is involved in DNA repair. Knowing this, what does this tell you about the relationship between DNA repair processes and the immune system?
A. DNA repair processes must be critical for the proper functioning of the immune system, as when they are nonfunctional, the immune system does not function properly.
B. The NBS1 gene must have multiple alleles, one that affects DNA repair, and one that affects the immune system.
C. Nijmegen breakage syndrome is caused by an epistasis relationship between a gene affecting DNA repair and a gene affecting the immune system.
D. Nothing. Nijmegen breakage syndrome is the result of polygenic inheritance, and therefore the immunodeficiency seen in these patients is due to the inheritance of another gene.
Answer:
A. DNA repair processes must be critical for the proper functioning of the immune system, as when they are nonfunctional, the immune system does not function properly.
Explanation:
The Nijmegen breakage syndrome (NBS) affects the immune system and this disorder is produced by mutations in the NBS1 gene involved in DNA repair, thereby evidencing a causal relationship between the immune system and the mechanism of DNA repair
Only red algae can grow in relatively deep regions of the ocean because red algae are: Select one: a. capable of absorbing carbon dioxide even from the carbon-dioxide-depleted deep waters and using the carbon dioxide to build sugars during photosynthesis. b. specialized for absorbing shorter wavelengths of light that penetrate deeper into the water for photosynthesis. c. able to perform chemosynthesis rather than photosynthesis. d. capable of absorbing ultraviolet light for photosynthesis, rather than visible light.
Answer:
b. specialized for absorbing shorter wavelengths of light that penetrate deeper into the water for photosynthesis.
Explanation:
There are two lights which are responsible for the photosynthesis in plants and algae i. e. red and blue light. These two lights are absorbed by the plants and algae in the process of photosynthesis while most of the light colors are reflected. In water red light remains in low depth while blue light penetrate deep into the water due to its shorter wavelength. So that's why red algae can grow due to the presence of blue light and photosynthesis occurs.
Correct Question and options:
Only red algae can grow in relatively deep regions of the ocean because red algae are:
a. capable of absorbing carbon dioxide even from the carbon dioxide deep waters and using the carbon dioxide to build sugars during photosynthesis.
b. specialized for absorbing longer wavelengths of light that penetrate deeper into the water for photosynthesis.
c. able to perform chemosynthesis, rather than photosynthesis.
d. capable of absorbing ultraviolet light for photosynthesis, rather than visible light.
Answer:
The correct answer is b. "specialized for absorbing longer wavelengths of light that penetrate deeper into the water for photosynthesis".
Explanation:
Red algae, also known as Rodophytes, are immobile organisms that inhabit the sea, but might also be found in freshwater and some of them can even be terrestrial. Due to its pigments, this algae is capable of absorbing sunlight in great depths, even much more than other types of algae. Rodophytes are photosynthetic organisms, which means that when they absorb sunlight they can transform it into energy.
Red algae´s coloration is due to the rhodoplasts that contain chlorophyll a, in addition to other pigments such as phycoerythrin and phycocyanin, that are phycobiliproteins. These last ones mask the chlorophyll and make a place to the characteristic algae´s red color.
Only red algae can grow in relatively deep-sea regions because they are specialized in photosynthesizing by absorbing longer light wavelengths that penetrate deeper into the water. Phycoerythrin is the one that absorbs the green wavelengths that reach deep regions and emits the red wavelengths of light. These proteins capture light energy and transfer it to chlorophylls during photosynthesis.
Mules, the offspring of donkeys and horses, are commonly used as pack animals. Despite the existence of mules, horse
and donkeys are considered separate species,
Which discovery would change that thinking and define horses and donkeys as the same species?
O
O
O
O
if mules looked more like donkeys
if mules looked more like horses
if mules could produce offspring
if mules were sterile
Answer:
If mules could produce offspring.
Explanation:
Even though horse and donkey produce mule, they are still regarded as different species because the mule produced cannot produce an offspring of its own.
The only why they can be considered as same species is if the mule can also reproduce.
The enzyme phosphorylase kinase catalyzes a modification of glycogen phosphorylase that controls its activity. How does phosphorylase kinase modify glycogen phosphorylase?
a.adenylation, which transfers an adenosine from ATP to the phosphorylase enzyme direct AMP
b.binding to glycogen phosphorylase after hydrolysis phosphorylation, which transfers a phosphate from ATP to the phosphorylase enzyme
c.a conformational change driven by the energy released when ATP is hydrolyzed
Answer:
B
Explanation:
Phosphorylase kinase modifies glycogen phosphorylase through phosphorylation, transferring a phosphate group from ATP to glycogen phosphorylase and thereby activating it. This regulatory mechanism is central to glycogen metabolism and responds to hormonal signals indicative of the body's energy status.
The enzyme phosphorylase kinase modifies glycogen phosphorylase through a process called phosphorylation, which transfers a phosphate from ATP (adenosine triphosphate) to the glycogen phosphorylase enzyme. This modification converts inactive glycogen phosphorylase b into the active form, glycogen phosphorylase a. This conversion is regulated by hormonal signals such as epinephrine and glucagon, which trigger a cascade involving the activation of adenylate cyclase, an increase in cAMP levels, and the subsequent activation of protein kinase A (PKA). PKA then phosphorylates phosphorylase kinase, which in turn phosphorylates the serine 14 residue on glycogen phosphorylase b, thereby activating it.
In summary, phosphorylation by phosphorylase kinase is critical for the regulation of glycogen metabolism, especially during the breakdown of glycogen to produce glucose for the energy needs of the cell. This regulation is tightly coupled to the cell's metabolic state and responds to hormonal signals reflecting the organism's overall energy balance.