A shift from expected allele frequencies, resulting from chance, is known as

a. natural selection.
b. genetic drift.
c. mutation.
d. gene flow.


a

Biology & Microbiology

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Which one of the following types of proteins interacts directly with a stop codon?

A. release factor B. initiation factor C. transcription factor D. elongation factor E. sigma factor

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The loss of mayflies from a stream suggests that the quality of water is declining; therefore, mayflies are a(n) ____ species.

a. degraded b. endangered c. threatened d. keystone e. indicator

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Shelled Amebas

What will be an ideal response?

Biology & Microbiology

Once species have formed, they keep their identity by

A. somatic mutations. B. structural modifications. C. genetic blocks. D. developmental differences. E. isolating mechanisms.

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