Which of the following is an indirect, as opposed to a direct, value of biodiversity?
A. ecotourism
B. medical use
C. consumptive use
D. food
E. agricultural use
Answer: A
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Which of the following air-filled respiratory system structures are common in insects?
a. gills b. tracheal tubes c. lungs d. integumentary surfaces e. air sacs
In __________ speciation, a geographic barrier interrupts gene flow between populations. Fill in the blank(s) with the appropriate word(s)
In homeostatic control, the ________ compensates for any deviation between the actual value and the set point. In body temperature regulation in mammals, this function is carried out by ________.
A. effector; brain B. effector; skeletal muscle C. sensor; neurons D. integrator; skeletal muscle E. integrator; brain
The capacity of the pathogen or disease-causing agent to survive outside the host and to exist or thrive in the environment.
a. susceptibility b. viability c. virulence d. none of the above