Animal cells are stimulated to divide by mitosis by:
a. colchicines.
b. magnetic fields.
c. mating.
d. growth factors.
e. nutrients.
D
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Which U.S. government agency monitors water utility reports?
A) Environmental Protection Agency B) Food and Drug Administration C) Water Safety Board D) Natural Resources Conservancy Commission
M. xanthus has an alternate motility type, known as ________ motility, because it is exhibited by single cells that leave the group, perhaps scouting for prey and requires a multiprotein motility "machine."
Fill in the blank(s) with the appropriate word(s).
The initial Davson-Danielli model of membrane proposed that the plasma membrane was composed of ______.
a) a lipid bilayer with a layer of globular proteins between the two leaflets of the bilayer b) a single layer of phospholipids coated on each side by a later of globular proteins c) a lipid bilayer lined on both its inner and outer surface by a layer of globular proteins d) a bilayer of globular proteins lined on its inner and outer surfaces by a layer of phospholipids
A female missing an X chromosome (XO) has Turner syndrome.
a. true b. false