If a plant were placed in continual darkness, it would continue to open and close its stomata at
approximately the same time each day. This phenomenon is governed by:
a. annual rhythms.
b. floral clocks.
c. transpiration.
d. temporal mechanisms.
e. circadian rhythms.
E
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Oxygen compounds toxic to pathogens include
A) hydrogen peroxide. B) hypochlorus acid. C) nitric oxide. D) hydrogen peroxide, hypochlorus acid, and nitric oxide.
The sweetener aspartame is a known excitotoxin. With regard to nerve cells, ingestion of this substance results in chronic nerve stimulation. With your knowledge of action potentials, this toxin must
A) stimulate continual impulses at the cell body. B) stimulate continual impulses at the dendrite. C) bind the nodes of Ranvier. D) block the synaptic cleft. E) stimulate continual impulses at the presynaptic receptors.
Scientists have determined that this crater was created by a(n) ____
a. subsidence event b. comet c. asteroid d. volcanic eruption e. earthquake
The Enterobacteriaceae do not produce oxidase compared to the pseudomonads that do produce oxidase.
a. true b. false