A variety of finch species within the Hawaiian Islands have acquired different types of beaks needed for utilizing specific food resources. The process by which these different species of finches came about is likely to have involved

A. natural selection.
B. evolution.
C. an accumulation of harmful genetic mutations.
D. both natural selection and evolution.
E. None of these choices are correct.


D. both natural selection and evolution.

Biology & Microbiology

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pH is a measure of

a. an enzyme's effectiveness. b. enzyme concentration. c. hydrogen ion concentration. d. none of the above.

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While some of the daughter helper T cells are secreting the appropriate interleukins, others form into ________ cells.

A) memory T B) suppressor T C) memory B D) plasma E) cytotoxic T

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Compare and contrast the mechanism of action of a steroid and a protein-type hormone at the cellular

level. What will be an ideal response?

Biology & Microbiology