During anaphase of mitosis, the 

A. nuclear membranes begin to reappear around each of the patches that will soon be daughter nuclei.
B. number of distinct chromosomes present is twice the number that was present before mitosis started.
C. centromeres have not divided.
D. chromosomes replicate by making exact copies of themselves.


B. number of distinct chromosomes present is twice the number that was present before mitosis started.

Biology & Microbiology

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Which of the following statements is true regarding microbial mats?

A. They contain archaeons. B. They contain oxygenic photosynthetic bacteria. C. They contain anoxygenic photosynthetic bacteria. D. Sunlight does not reach microbial mat levels inhabited by chemoautotrophs. E. All of these answer options are correct.

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Estuaries for many transient species are considered:

a. a place to spawn. b. nurseries. c. too full of predators for juveniles. d. very stable environments.

Biology & Microbiology

When you bring your hand to your shoulder, your biceps muscle ____ and your triceps muscle ____

a. contracts; relaxes b. relaxes; contracts c. contracts; contracts d. relaxes; relaxes e. lengthens; shortens

Biology & Microbiology

For which of the following traits is human mating expected to be nonrandom?

A) Blood type B) Isocitrate dehydrogenase enzyme C) Skin color D) Presence or absence of a widow's peak E) Fingerprint loci

Biology & Microbiology