The transfer of heat from arteries that carry warm blood past veins that carry cooler blood is an example of
A) insulation.
B) countercurrent heat exchange.
C) evaporative cooling.
D) behavioral thermoregulation.
Answer: B
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The time required to kill 90% of the microorganisms or spores in a sample at a specified temperature is the
A. thermal death point (TDP). B. decimal reduction time (D value). C. thermal death time (TDT). D. z value.
What is the function of the contractile vacuole?
A. to help single-celled organisms maintain homeostasis in a hypotonic environment B. to help single-celled organisms change shape in response to environmental changes C. to help maintain water balance for singlecelled organisms living in a hypertonic environment D. to maintain cell shape through turgor pressure
The specific heat of water is
a. a gram of substance. b. energy required to raise a gram of substance 1? F. c. calories need to heat seawater. d. energy required to raise a gram of substance 1? C. e. energy required to evaporate 1 gram of liquid water.
The Nod factor is an important component of
A. the Calvin Cycle. B. legume-bacterial interactions. C. mycorrhizal-terrestrial plant interactions. D. the formation of the digestive enzymes of carnivorous plants. E. trichloroethylene metabolism.