True or false: A species' niche is determined only by its physical environment
A. true
B. false
B
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Why do neurons generate an action potential, instead of simply relying on the opening of ion channels near the stimulus site to transmit information?
A. Because without the actions potential, changes in Vm at the stimulus site might not reach the axon terminal B. Because without the sectional potential, the neuron would not depolarise C. Because action potentials help the body keep ion concentrations at appropriate levels D. Because without the action potential, the neuron would not return to resting potential
In the axoneme, sidearms
A) are 10 protofilament incomplete microtubules attached to 13 protofilament microtubules. B) generate force to slide microtubules past one another. C) project toward the central pair from each outer doublet. D) link adjacent doublet microtubules to limit sliding. E) are complete 13 protofilament microtubules.
Pseudomonas aeruginosa is resistant to many antimicrobics.
a. true b. false
Your friend has never gardened before. When none of the seeds he planted germinate, he asks you to suggest why. Which is the best explanation of what occurred?
A. Seeds take more than one season to germinate. B. The suspensor failed to develop into an embryo within each seed. C. All seeds require fire in order to germinate. D. The monocot seeds he used were only able to produce a single cotyledon each. E. The seeds were planted too deeply and used up their reserves before reaching the surface and sunlight.