The behavior of animals is under the control of
A. the endocrine system.
B. the nervous system.
C. both the nervous system and the endocrine system.
D. neither the nervous system nor the endocrine system.
C. both the nervous system and the endocrine system.
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An incompletely dominant gene controls the color of
chickens so that BB produces black, Bb produces a slate-gray color called blue, and bb produces splashed white. A second gene controls comb shape, with the dominant gene R producing a rose comb and r producing a single comb. If a pure-breeding, black chicken with a rose comb is mated to a splashedwhite chicken with a single comb in the F2 generation, what fraction of the offspring will be blue with single comb? a. 9/16 b. 3/8 c. 3/16 d. 1/8 e. 1/16
Protists are
a. autotrophic. b. heterotrophic. c. unicellular. d. multicellular. e. all of these.
The photograph above of the aphid and the wasp is
an example of a. mimicry. b. display behavior. c. warning coloration. d. chemical defenses. e. biological control of pests.
Following electrical stimulation of a muscle cell, calcium functions to
A) stimulate the enzymes that produce ATP. B) bind to the protein troponin. C) leak out of the muscle cell to re-establish the membrane potential. D) break down acetylcholine. E) maintain the relaxed state of the muscle.