The largest reservoir of water is
a. oceans.
b. polar ice and glaciers.
c. groundwater.
d. lakes and rivers.
e. atmosphere.
A
Biology & Microbiology
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Which junction influences the passage of ions and small molecules between cells?
a. gap b. adhering c. loose d. tight e. plasma
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The maximum useful magnification for a light microscope is about
a. 100X. b. 1000X. c. 10,000X. d. 100,000X.
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Embryonic stem cells are different from primary cell cultures or permanent cell lines derived from a tissue in that they are capable of
a. generating many cell types. b. growing and dividing. c. synthesizing their own DNA. d. transporting nutrients across their plasma membrane.
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Animals in which the anus develops before the mouth in the embryo are
A. coelenterates. B. protostomes. C. deuterostomes. D. coelomic.
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