Every population of animals has an age structure. The individuals that make up the population are all
of a specific age, but individuals do not have an age structure. Age structure is an example of a(n)
_____.
a. emergent property.
b. environmental property.
c. hierarchical property.
d. organizational property.
e. cellular property.
A
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Worldwide, decay of organic matter is important to the global carbon cycle because it ____ tens of billions of tons of
carbon dioxide each year.
a. removes from the atmosphere b. prevents the planet from losing c. returns to the atmosphere d. prevents plants from having access to e. releases to space
Experiments in which nitrogen supplementation increased the biomass of both plants and herbivores show ____
a. bottom-up control b. top-down control c. indirect control d. inverted cascades e. nutrient cycling
Which of the following is an organic molecule?
A. CaCO3 B. (BH)3(NH)3 C. NaCl D. C6H12O6
Which of the following are virulence factors contributing the pathogenicity of Neisseria species?
A) hemolysin B) fimbriae C) a capsule D) exotoxins E) both a capsule and fimbriae