A population of caterpillars feeds on the leaves of trees in a forest and is in turn food for birds that eat them off the tree leaves. Given this information, which adaptation would be most likely to evolve?
A) Caterpillars would evolve to a larger size.
B) Caterpillars would evolve to eat the bark as well as the leaves.
C) Birds would evolve to eat more types of insects.
D) Caterpillars would evolve to a color that matched the leaves they eat.
D
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Chemical synapses are distinctive for all of the following EXCEPT
a. they require the use of ligand-gated ion channels. b. they require the use of voltage-gated ion channels. c. they may utilize direct neurotransmitters. d. they require the use of vesicles. e. they require proteins.
Which of the following is an amphibian?
A. coelacanth B. turtle C. octopus D. toad E. lizard
The receptors in the respiratory center are most sensitive to a small
A) increase in blood carbon dioxide levels. B) increase in blood oxygen levels. C) decrease in blood nitrogen levels. D) decrease in blood oxygen levels. E) increase in blood pH.
Which of the following is a characteristic by which viruses are classified?
A. type of nucleic acid B. type of life cycle C. number of chromosomes D. type of host E. size