The common garter snake is a predator of the rough-skinned newt. These newts produce a
potent neurotoxin that is concentrated in their skin, but garter snakes have evolved resistance
to this toxin.
This is an example of __________.
a. natural selection
b. sexual selection
c. coevolution
d. natural selection and coevolution
D
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Which of the following characters are considered analogous?
Which of these is not a possible function of trichomes?
A. reflect light from leaf surfaces B. store or secrete salt C. defend against insects D. structural support E. irritate potential herbivores
Motor neurons release the neurotransmitter acetylcholine (ACh) and acetylcholinesterase degrades ACh in the synapse
If a neurophysiologist applies onchidal (a naturally occurring acetylcholinesterase inhibitor produced by the mollusc Onchidella binneyi) to a synapse, what would you expect to happen? A) paralysis of muscle tissue B) convulsions due to constant muscle stimulation C) decrease in the frequency of action potentials D) no effect
The strength of selection for a color pattern is greater in snakes that flee by turning than in snakes that flee straight.
a. true b. false