In a lipid bilayer, __________ fatty acid tails face each other within the bilayer and form a region that
excludes water.
a. hypertonic
b. hyperosmotic
c. hypotonic
d. hydrophilic
e. hydrophobic
E
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In seeds, the shift from active metabolism to dormancy, and then reactivation and germination is based
on levels of
a. a number of hormones. b. the temperature response of hormones. c. antagonistic hormone action. d. abscisic acid. e. temperature.
The organ responsible for excretion of both
urine and feces indicated by the letter"F" is called the a. mouth. b. crop. c. gizzard. d. secreting portion of stomach. e. cloaca
Under which of the following situations would receptor down-regulation most likely occur?
a. The concentration of a neurotransmitter is too low. b. The concentration of a hormone is too high. c. The number of receptors in the plasma membrane is too low. d. The number of G proteins is too high. e. The cell is unable to manufacture cyclic AM
Which of the following is NOT characteristic of Actinomyces israelii?
A. Important for compost production B. Found in soil C. Rods with colonies displaying hyphael growth D. Strict aerobe E. Non-endospore former