Unlike plants, fungi, and bacteria, animal cells cannot resist volume increases in hypotonic environments. This is
because unlike those other organisms, animal cells ____.
a. do not have central vacuoles
b. do not have cell walls
c. do not have pumps that can actively pump out excess fluid
d. are smaller than those other cells and thus cannot handle large increases in volume
e. have relatively more solutes
ANSWER: b
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We think of termites as insects that "eat" wood. In fact, however, termites rely on a variety of eukaryotic and prokaryotic gut microbes to digest cellulose—without the microbes, the termites will ingest wood, but will starve
This, then, is an example of a(n); A. obligate mutualism B. obligate antagonism C. facultative mutualism D. facultative antagonism E. none of the answer options are correct.
At what phase of the cell cycle does p53 halt cell division if it senses DNA damage?
A. S B. G2 C. M D. G0 E. G1
Diploid means having
A. one complete set of chromosomes. B. three complete sets of chromosomes. C. two complete sets of chromosomes. D. two chromosomes in each somatic cell. E. two chromosomes in each gamete.
An organic compound that provides instructions for the synthesis or production of polypeptide chains is referred to as which of the following?
A) lipids B) DNA C) ATP D) nucleotide