2n is an abbreviation for
A. diploid.
B. gametes.
C. haploid.
D. mitosis.
E. meiosis
A. diploid.
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A proton pump is needed in the lysosomal membrane because:
A. the interior of the lysosome needs to be acidic. B. protons are being moved from low to high concentration. C. protons cannot move across a membrane on their own. D. All of the answer options are correct.
West Nile virus is transmitted to humans by which vector?
a. birds b. cats c. other humans d. mosquitoes e. bacteria
Which one of the following best describes the evolutionary advantage of bipedalism?
A) allows an organism to have precise control over the action of the thumb and fingers B) frees the hands for carrying objects C) results in improved eye-hand coordination D) in early humans, allowed for complex motions associated with the use of tools E) increases the chance that an organism can communicate through the written word
Muscle cells produce lactic acid when they have an inadequate supply of
A) protein. B) O2. C) calcium. D) actin and myosin. E) glycogen.