Inside of the penis there are ____ cylinders of
spongy tissue.
a. one
b. two
c. three
d. four
e. none of these
C
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Perpetually young tissues where cells retain the
ability to divide are a. vascular. b. meristematic. c. protective. d. photosynthetic. e. all of these.
Prokaryotes have ________ ribosomes with ________ and ________ subunits, whereas eukaryotes have ________ ribosomes with ________ and ________ subunits
A) 80S, 50S, 30S; 100S, 60S, 40S B) 100S, 60S, 50S; 90S, 60S, 40S C) 70S, 50S, 30S; 80S, 60S, 40S D) 70S, 40S, 30S; 80S, 50S, 30S E) 80S, 60S, 40S; 70S, 50S, 30S
Some animal populations are kept in check by
A. hosts. B. decomposers. C. amensalism. D. predators.
Which type of medium suppresses the growth of unwanted bacteria and encourages growth of desired microbes?
A. differential media B. complex media C. selective media D. enrichment media