The classic work of Huffaker demonstrated that orange-eating mites were able to survive predation by "mite-eating" mites provided that:

A. the starting size of the orange-eating mite
population was large compared to that of the
mite-eating mites.
B. the starting size of the mite-eating mite
population was below a certain threshold.
C. the orange-eating mites were provided
with ample food sources.
D. the orange-eating mites had access to
"refuges" where they were safe from
predation.
E. the mite-eating mites had access to
"refuges" where they were isolated from
parasites that infected orange-eating mites.


D

Biology & Microbiology

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Hawaiian fruit flies provide an example of which of the following?

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Refer to the accompanying figure. Which of the following is a steroid hormone?


a. 1
b. 3
c. 6
d. 8
e. 10

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