Clumps of microtubules in aging neurons are called
a. beta amyloid.
b. neurofibrillary tangles.
c. neural atrophy.
d. plaques.
e. ganglionic fossae.
B
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The finding that homeotic genes are present in both mammals and insects indicates that these genes must
A. control the same traits. B. be on the same chromosomes. C. have arisen very early in the evolutionary history of animals. D. have developed independently and simultaneously. E. have been transmitted into mammals by an insect bite. 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 homeotic genes? Consider Possibilities · Consider the different answer options. Which can you rule out? 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?
Compare and contrast the processes of photosynthesis and aerobic respiration. How are they similar
and how do they differ? What will be an ideal response?
One of the key contributions of the punctuated equilibrium model is that it helps explain
A) why transitional fossils are more common than Darwin would have predicted. B) why transitional fossils tend to be rare and certain common fossil species remain unchanged for long time spans. C) how new species arise from hybridization events. D) why large, widespread populations tend to be the ones that evolve most rapidly and unpredictably.
Two forms of hemophilia are determined by genes on the X chromosome in humans. Assume that a phenotypically normal woman whose father had hemophilia is married to a normal man. What is the probability that their first daughter will have hemophilia?
A) zero B) 1/2 C) 1/4 D) 1/3 E) 100%