Crossing over is ________.

A. an independent assortment of chromosomes
B. the exchange of corresponding portions of homologous chromosomes.
C. the formation of tetrads
D. the movement of genetic material from one chromosome to a nonhomologous chromosome


B. the exchange of corresponding portions of homologous chromosomes.

Biology & Microbiology

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A comparative morphologist would be most likely to study ________

a. theological writings about the origins of life b. the worldwide distribution of cactus-like plants c. the distribution of earthquakes and volcanoes d. differences and similarities in the structures of organisms

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Diploid cells have two copies of each chromosome

1.True 2.False

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One strategy that allows larger cells to have an effective surface area to volume ratio is:

a. having a completely spherical shape. b. being short and fat. c. having thin, finger-like projections. d. having a thinner plasma membrane. e. locomotion

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The urochordates are

a. Called tunicates b. Marine animals c. Sessile as adults, but tadpole-like as larvae d. Often abundant in intertidal zones e. All choices are correct

Biology & Microbiology