A situation in which the birth rate equals the death rate is called
a. an intrinsic limiting factor.
b. exponential growth.
c. saturation.
d. zero population growth.
e. geometric growth.
D
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In contrast to most other plant hormones, which hormone is a germination inhibitor?
a. auxin b. gibberellin c. cytokinin d. abscisic acid e. ethylene
Coral mutualisms
What will be an ideal response?
The many species of tree frogs that inhabit forests in the eastern United States maintain their genetic isolation from other species by several mechanisms, including "singing" slightly different songs. Which type of isolating mechanism does this
represent? A) behavioral isolation B) ecological isolation C) mechanical isolation D) temporal isolation
The role of healthcare workers in the management of disease outbreaks
A) should be addressed through periodic training and re-training. B) is limited to properly using personal protective equipment. C) can be approached casually. D) is not critical in U.S. healthcare facilities. E) is only important in BSL-3 or higher facilities.