The term amphipathic describes the characteristic of some molecules that have ________.
A) two polar regions
B) only a single polar region
C) both a polar and a nonpolar region
D) no polar regions
E) two nonpolar regions
C) both a polar and a nonpolar region
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Over time, the carbon isotope 14C decays into
a. 12C. b. 14N. c. 12N. d. 13C. e. 12B.
Ecological pyramids can be upright or inverted, depending on the ecosystem. If the numbers pyramid is inverted, what information does this portray?
a. extinction event b. ecosystem recovering from catastrophe c. lower populations in producers than consumers d. excessive nutrients in the system
The enzyme that functions in the small intestine to digest carbohydrates is pancreatic ________
Fill in the blank(s) with the appropriate word.
Oxygen-poor blood circulates through
a. A. b. B. c. C. d. D. e. A, C, and E.