The bones in the forelimbs of vertebrates ____.
A. can often be traced to a common ancestor
B. offer no evidence to support the theory of evolution
C. perform the same function no matter which species they are in
D. may exhibit either analogy or homology but not both when compared to the forelimb of another animal
E. show convergence with some invertebrate structures
Answer: A
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In the food chain below, what does the garden spider represent? crabgrass—cricket—garden spider—blue jay—red-tailed hawk
A. herbivore B. primary producer C. primary carnivore D. secondary carnivore E. detritivore Clarify Question · What is the key concept addressed by the question? · What type of thinking is required? Gather Content · What do you already know about trophic levels? 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?
Purines and pyrimidines are two classes of organic bases found in ____
a. sugars b. phosphates c. fats d. carbohydrates e. nucleic acids
Choose the most appropriate answer for each.
A. Camouflage B. Species evenness C. Parasitism D. Pioneer species E. Primary succession F. Species richness G. Mutualism H. Competitive exclusion I. Mimicry J. Succession K. Secondary succession
At an underdominant locus, how will allele frequencies change through time?
a. The homozygote with the greatest fitness advantage will have its allele fixed. b. A balanced polymorphism of both alleles will be maintained at a stable equilibrium. c. The homozygote with the lowest fitness advantage will have its allele lost. d. One or the other allele will be lost depending on their initial frequencies. e. Both alleles will be lost.