What two processes are involved when eukaryotic cells import and secrete large molecules?
a. exocytosis when importing and diffusion when secreting
b. exocytosis when importing and endocytosis when secreting
c. endocytosis when importing and exocytosis when secreting
d. diffusion when importing and exocytosis when secreting
Answer: c. endocytosis when importing and exocytosis when secreting
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A. convergent evolution; multiple Old World populations B. adaptive radiation; a single Old World population C. parallel evolution; multiple Old World populations D. allopatric speciation; a single Old World population E. peripatric speciation; a single Old World population
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a. sand. b. humus. c. silt. d. clay. e. mineral.
The target cells of glucagon are
a. the liver cells. b. the skeletal muscle cells. c. the fat cells. d. all of these cells. e. none of these cells
The methanogenic archaeans are __________ that
pull electrons from __________. a. chemoautotrophs; oxygen b. chemoheterotrophs; carbon dioxide c. chemoautotrophs; water d. chemoheterotrophs; methane e. chemoautotrophs; hydrogen gas