Major gene reshuffling takes place during

a. telophase I.
b. metaphase I.
c. anaphase I.
d. metaphase II.
e. anaphase II


B

Biology & Microbiology

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Escherichia coli and Clostridium acetobutylicum are reported to be derived from a common ancestor. They have some similar, but not identical gene sequences. What is the best explanation for this difference in genetic coding?

A. After the two species diverged, the similar gene sequences evolved through convergent evolution. B. The two species never diverged, but were discovered by two different scientists and given different names. C. After the two species diverged, the genes accumulated random mutations that resulted in similar, but not identical gene sequences. D. The two species are not closely related, but E. coli passed the similar gene sequences to C. acetobutylicum via horizontal gene transfer.

Biology & Microbiology

Which chemical released by white blood cells causes arterioles to dilate?

a. cytokines b. histamine c. interferons d. complement e. interleukins

Biology & Microbiology

Urbanization impacts

A) all species positively. B) all species negatively. C) most species negatively, but a few positively. D) most species positively, but a few negatively.

Biology & Microbiology

The movement of 25-year-old fertile individuals between Mexico and Canada will eventually

contribute to: a. genetic drift. b. directional selection. c. natural selection. d. gene flow. e. mutation.

Biology & Microbiology