Substances that alter sensory perception, cause
disorientation, and inhibit the ability to perform
complex tasks are
a. depressants.
b. stimulants.
c. analgesics.
d. hallucinogens.
e. antipsychotics.
Answer: d
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Sugary secretions of plants attract various insects as a source of nutrition. In addition to pollination, which of the following can be a benefit for the plant in this relationship?
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You accidentally exposed your cell culture dish to radiation, but you are not sure of the precise wavelength of the exposure
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Each of the following statements concerning the gram-positive cell wall is true EXCEPT
A) it maintains the shape of the cell. B) it is sensitive to lysozyme. C) it protects the cell in a hypertonic environment. D) it contains teichoic acids. E) it is sensitive to penicillin.