During meiosis I:
A. bivalents are formed during prophase I and
are taken apart during anaphase I.
B. chromosomes undergo reductional
division.
C. sister chromatids are not separated.
D. nonsister chromatids exchange maternal
and paternal DNA.
E. All of these choices are correct.
E
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The midrange of an array of phenotypes is favored in ____.
A. genetic drift B. disruptive selection C. gene flow D. stabilizing selection E. directional selection
A plant's ability to absorb carbon dioxide is reduced when:
A. water is plentiful. B. temperatures are cold. C. stomata are closed. D. the epidermis is lacking. E. mesophyll cells lack air spaces.
The fibrous sac that surrounds the heart and produces lubricant for heart contraction is the
A) myocardium. B) pericardium. C) endocardium. D) epicardium. E) reticulocardium.
reproductive isolation
What will be an ideal response?