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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Which of the following is not a biological effect associated with endotoxin?
A. Paralysis B. Coagulation C. Fibrinolysis D. Fever
A scientist has tracked the population sizes of wolves and caribou within a national park. Assuming that there are no other prey species available to the wolves, how will the wolf and caribou populations change over time?
A. The wolf population will increase as caribou numbers increase (although there will be a slight lag). B. The wolf population will increase exponentially, regardless of the caribou population. C. The wolf population will decrease as caribou numbers increase (although there will be a slight lag). D. The wolf population will fluctuate between high and low levels, but this will be independent of the caribou population. E. The wolf and caribou populations will fluctuate periodically, and the graphs of their population size will match exactly (i.e., there is no lag).
The NADH and the hydrogen ions produced in glycolysis must become __________ in the cytoplasm by donating its electrons to pyruvic acid.
Fill in the blank(s) with the appropriate word(s).
In extremely cold regions, woody species may survive freezing temperatures by _____
A) emptying water from the vacuoles to prevent freezing B) decreasing the numbers of phospholipids in cell membranes C) decreasing the fluidity of all cellular membranes D) increasing cytoplasmic levels of specific solute concentrations, such as sugars