All of the genes in a population comprise its
A) genotype.
B) gene pool.
C) gene reservoir.
D) genome.
B) gene pool.
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Cellular membranes are
A. fluid. B. solely composed of lipids. C. composed of a single layer of amphipathic molecules. D. selective to the transport of gases and small molecules only. E. characteristic of eukaryotes, but not prokaryotes.
An ABC transporter:a
is a type of water channel. b. uses the energy of ATP to transport solutes. c. uses gated channels to transport ADP. d. is present in kidney tubules and prevents dehydration. e. is a type of porin.
Darwin predicted that advantageous, heritable characteristics would become less common in a population when
individuals were forced to compete for limited resources
a. True b. False
What determines the direction of the voltage change that occurs at the postsynaptic membrane?
A. the type of neurotransmitter B. the type of second messenger system used C. the type(s) of ions that travel through opened channels D. the number of ion channels on the postsynaptic membrane