A molecule that gives up an electron becomes:
a. ionized only
b. oxidized only
c. reduced only
d. both ionized and oxidized
e. both ionized and reduced
d
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The binding of a neurotransmitter to ligand-gated Cl- channels will cause ____ in the postsynaptic membrane
a. depolarization only b. hyperpolarization c. repolarization only d. apolarization e. depolarization and repolarization
All of the following traits are true of fibrous root systems except that they are not ________
a. adapted to take advantage of light rains b. typical of eudicots c. made up of both lateral and adventitious roots d. produced by grasses
Multigene families
a. come from a single gene duplication event. b. come from repeated cycles of gene duplication followed by mutation. c. from single point mutations. d. come from exon shuffling. e. come from deletions of genes.
A main function of a plant's root system is to:
a. photosynthesize. b. absorb dissolved nutrients and water. c. absorb atmospheric carbon dioxide. d. capture sunlight. e. bear seed-containing fruits.