During prophase II, ____.

A. a new spindle forms
B. crossing over occurs
C. chromosomes are single-stranded
D. the cell is diploid
E. the nuclear envelope re-forms


Answer: A

Biology & Microbiology

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Which of the following most accurately describes what is happening along the electron transport chain in the accompanying figure?

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All living species in the Osteichthyes clade have endoskeletons composed entirely of cartilage

a. True b. False

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Argentine fire ants entered the United States in the

a. 1920s. b. 1930s. c. 1940s. d. 1950s. e. 1960s.

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What feature/s is/are shared by your skin, your lungs and your gut?

A. All are continuous with the outside of the body. B. All are lined by epithelial cells. C. A and B D. Neither A nor B

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