The attraction between Na+ cations and Cl? anions forms ____ that hold together the compound NaCl
a. polar covalent bonds
b. van der Waals forces
c. ionic bonds
d. hydrogen bonds
e. nonpolar covalent bonds
C
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Carrier-mediated transport is also called
A. facilitated diffusion. B. active transport. C. exocytosis. D. endocytosis. E. phagocytosis.
The theory of continental movement is called ____
a. plate tectonics b. plate drift c. seismology d. fault line movement e. sea floor spreading
The process that normally exerts the greatest control
over the water balance of an individual is a. sweating. b. elimination in feces. c. kidney function. d. evaporation through the skin. e. respiratory loss.
The Irish Potato Famine (from potato blight) was caused by a mildew that belongs to which group?
A) bacterium B) stramenopile C) foraminiferan D) apicomplexan E) virus