The nucleotides called pyrimidines include

A. uracil and cytosine.
B. uracil and thymine.
C. thymine and cytosine.
D. thymine and adenine.
E. cytosine and guanine.


C. thymine and cytosine.

Biology & Microbiology

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Rarely, a chromosome's structure becomes altered when part of it undergoes duplication, deletion, __________, or

__________. Fill in the blank(s) with the appropriate word(s).

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Spermatids are indicated by

a. A. b. B. c. C. d. D. e. C and D.

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During which phase are sister chromatids separated?

a. prophase b. metaphase c. anaphase d. telophase e. cytokinesis

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Members of the genus Chlamydia are

A. thermophiles. B. intracellular parasites. C. classified with the deeply branching bacteria. D. endospore-formers. E. Gram-positive bacteria.

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