What best describes mycorrhizae?
a. a type of root hair
b. involved in bacteria-root associations
c. involved in fungus-root associations
d. bacteria
e. small animals found in agricultural soils
c
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Which of the following groups would be most likely to exhibit uniform dispersion?
A) red squirrels, who actively defend territories B) cattails, which grow primarily at edges of lakes and streams C) dwarf mistletoes, which parasitize particular species of forest tree D) moths, in a city at night E) lake trout, which seek out cold, deep water high in dissolved oxygen
A frequent symptom of the common cold is
A) nasal discharge. B) fever. C) headache. D) diarrhea.
Scaphopods use tentacles on their heads for capturing their prey
Indicate whether the statement is true or false
All of the following statements concerning nitrogen fixation are true EXCEPT which one?
A. The amount of carbon that is taken up by plants and microbes can be dictated by how much nitrogen is available to support growth. B. Nitrogen fixing microbes convert N2 to ammonia. C. The products of nitrogen fixation are incorporated into amino acids and nucleic acids. D. Nitrogen fixation does not affect the rate of carbon flux.