Which of the following arose before all of the others listed here?
a. crocodiles
b. lizards
c. turtles
d. snakes
c. turtles
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Plants grow toward the light because:
A. auxin concentration on the shaded side increases. B. stem elongation is greater on the side exposed to the light. C. gibberellin concentration is greater on the side exposed to light. D. cells on the shaded side divide more rapidly due to the presence of ethylene. E. photoreceptive statoliths settle to the bottom of the cells on the shaded side.
What process increases the size of a muscle?
a. increased muscle cell division b. addition of muscle companion cells c. stretching of individual muscle cells d. synthesis of new protein filaments e. more than one of these
During gene flow, an influx of deleterious alleles can speed adaptation within a population
a. true b. false
A deficiency of ammonia would inhibit the production of which of the following molecules?
A. glucose and fructose B. short chain fatty acids C. proline and alanine D. starch E. long chain fatty acids