Which of the following is NOT dependent on the
others as a source of food?
a. carnivores
b. herbivores
c. producers
d. detritivores
e. decomposers
Answer: c
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Anaerobic respiration is most common in
A. animals. B. protozoans. C. fungi. D. plants. E. archaeans.
In nature, genes with the potential to produce serious defects are acted against and kept at a low
frequency by: a. neutral variations. b. stabilizing selection. c. disruptive selection. d. frequency dependent selection. e. natural selection.
Bacteria are grown in 15N (heavy) medium and then transferred to 14N (light) medium and are allowed to replicate for one generation. The DNA is subsequently isolated and centrifuged in a CsCl2 gradient to yield what type of gradient band(s)?
A. one heavy and one half-heavy band B. one heavy and one light band C. one light band D. one half-heavy (intermediate to heavy and light) band E. one heavy band
What organism would be at the second level in a detrital food web?
A. leaves B. shrews C. detritus D. earthworms E. birds