Homoplastic structures are a result of __________ evolution
a. convergent
b. divergent
c. the absence of
d. multiphyletic
e. derived
A
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When two excitatory postsynaptic potentials (EPSPs) occur at a single synapse so rapidly in succession that the postsynaptic neuron's membrane potential has not returned to the resting potential before the second EPSP arrives,
the EPSPs add together producing _____. A) temporal summation B) spatial summation C) tetanus D) the refractory state E) an action potential with an abnormally high peak of depolarization
Each of the following plays a role in the recycling of proteins in a cell EXCEPT
A. ubiquitin. B. proteasomes. C. clathrin. D. ATP.
Deforestation:a
retards soil erosion. b. releases carbon dioxide that may contribute to global warming. c. has no effect on the extinction of biological species. d. promotes the preservation of tropical birds. e. is only a threat to tropical rain forests.
The establishment clause states that ______.
A. all citizens may engage in religious activities of their choice B. the federal government will not support an official state church C. no religious test for holding federal office can be imposed D. religious groups can compel public schools to teach their precepts