The vertebrate spinal cord develops from the embryonic _____
A) notochord
B) dorsal hollow nerve cord
C) pharyngeal pouch
D) coelom
E) podia
Answer: B
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Which of the following pigments is found exclusively in red algae?
A) chlorophyll a B) chlorophyll c C) lutein D) phycoerythrin E) ?-carotene
Dialysis is a procedure in which a machine takes over the function of the
A. liver. B. pancreas. C. hypothalamus. D. urinary bladder. E. kidney.
The Red Queen hypothesis is closely tied to the concept of an evolutionary arms race. Which examples below depict an evolutionary arms race?
A. An ant colony feeds its fungus garden, and the fungus garden feeds the ants B. A plant evolves toxins that causes a herbivorous beetle population to dwindle, until an allele for a detoxifying chemical spreads through the beetle population C. A butterfly species that is non-toxic mimics the aposematic coloration of a toxic species of butterfly D. An allele that causes female frogs to prefer males with loud calls spreads through a population, so the population evolves to have males with louder and louder calls
Many people think long-term evolution of a species must follow the rule "adapt or die." Which of the following will not help organisms overcome an environmental change that threatens extinction?
A. The will to survive B. High levels of genetic variation C. A large population size D. Phenotypic plasticity that buffers environmental change E. A high rate of beneficial mutations