In bacteria, fungi, and plants the high internal pressure generated by osmosis is counteracted by the mechanical strength of their
A. plasma membranes.
B. organelles.
C. cell walls.
D. cytoskeletons.
Answer: C
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If a restriction endonuclease cuts a linear DNA three times, how many fragments should there be after
the DNA is subjected to electrophoresis through an agarose gel?
a. 1 b. 2 c. 3 d. 4 e. 5
What organism is in a symbiotic relationship with zooxanthellae which use this organism's waste as nutrients?
a. Foraminiferans b. Choanoflagellates c. Dinoflagellates d. Radiolarians
A cohort is ____
a. a group of individuals of the same species born during the same time interval b. any member of the same species c. a group of individuals with the same parents d. a group of individuals of the same sex e. any group of closely related individuals
Which of these thermoregulation processes can be sustained for the longest period of time?
A. nonshivering thermogenesis B. fever C. hibernation D. shivering E. sweating