Hypothermia is defined as body temperature less than ____.
a. 91 degrees F
b. 95 degrees F
c. 93 degrees F
d. 89 degrees F
Answer: b. 95 degrees F
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Escherichia coli bacteria in human colons provide humans with vitamin K in return for a steady food supply and warm place to live. This is an example of a ____ relationship
a. mutualistic b. predatory c. commensal d. parasitic e. habitat
Population size depends upon
a. deaths. b. births. c. migration. d. immigration. e. all of these.
Which of the following describes the fate of most of the water taken up by a plant?
a) It is used as a hydrogen source in photosynthesis. b) It is used as a solvent. c) It makes cell elongation possible. d) It is lost during transpiration. e) It is used to keep cells turgid.
Which of the following is true?
a. Evolution always progresses toward complexity. b. Complexity once gained cannot be lost. c. Modern bacteria and archaea are more complex than ancestral forms. d. Complexity can be lost.