Which of the following is not a function of cerebrospinal fluid?
a. cushioning the brain
b. cushioning the spinal cord
c. providing the brain with nutrients
d. removing wastes from the brain
e. transmitting impulses
E
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During resting exhalation in humans, the diaphragm ____ and the internal intercostal muscles ____
a. contracts; relax b. relaxes; contract c. contracts; contract d. relaxes then contracts; contract then relax e. relaxes; relax
Which of the following is NOT dependent on
the others as a food supply?
a. carnivores b. herbivores c. producers d. detritivores e. decomposers
Striated means
a. multinucleated. b. fibrous. c. voluntary. d. striped. e. bundled.
Which of the following is most likely to decrease genetic variation?
A) directional selection B) mutation C) stabilizing selection D) diversifying selection