An animal with bilateral symmetry:
a. has no defined body sides
b. usually has no body cavity
c. has body parts repeated around a central axis
d. has left and right sides and usually displays cephalization
e. is not typical of animals with a three-layer body plan
d
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What might be an advantage to using an individual's own stem cells instead of pancreatic cell allografts to treat type I diabetes?
A. Stem cells can disable the immune responses that led to the diabetes state in the first place. B. This process should be far cheaper than the surgical intervention needed for the allograft. C. You can't do this-stem cell research it is still theoretical, not approved by the FDA, and is currently illegal in the United States. As such, there is no advantage. D. If you were able to use a person's own cells, it would be considered an autograft rather than an allograft. As such, there should be no HLA/MHC matching required, and no long-term anti-rejection drugs needed.
Answer the following statement(s) true (T) or false (F)
1. A soil sample with a OH- concentration of 10-9 M may also have high levels of aluminum. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about the relationship between [OH-] and aluminum in the soil? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result? 2. As global temperatures increase, evidence suggests that ribulose 1, 5-biphosphate carboxylase/oxygenase (rubisco) is likely to denature and photosynthesis rates will decrease. 3. Saline soils have a higher water potential than plant roots. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about how water potential is affected by saline soil? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result? 4. Most parasitic plants like other land plants have mycorrhizal symbionts. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about how parasitic plants obtain nutrients? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result? 5. A nematode that has parasitized a plant has breached the cutin layer of the epidermis. Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? · What key words does the question contain and what do they mean? Gather Content · What do you already know about how nematodes infect plants? How does it relate to the question? Consider Possibilities · What other information is related to the question? Which information is most useful? Choose Answer · Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer? Reflect on Process · Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
A population that is growing exponentially in the absence of limiting factors can be illustrated by which curve?
a. S-shaped b. J-shaped c. one that terminates in a plateau phase d. bimodal e. binomial
Mammals, like humans and apes, have five digits on their fore and hind limbs. Modern horses have one. How might you reconstruct the ancestral state of mammal toe number?
A. Investigate the number of toes on all extant horses and apes. B. Investigate the number of toes for other mammals and use parsimony to deduce the ancestral state. C. Investigate the number of toes for an outgroup that is closely related to mammals, for example reptiles or amphibians. D. Either b or c E. All of the above