The largest amount of carbon is involved in
A) natural fire.
B) biological processes in the oceans.
C) respiration from land organisms.
D) fossil fuels.
B) biological processes in the oceans.
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The relationship between a flea and the animal it feeds off of is an example of
A) parasitism. B) commensalism. C) symbiosis. D) both A and C
Increasing global temperatures leads to increasing global emissions of longwave radiation. This is an example of a
A) negative feedback B) positive feedback C) neutral feedback D) adiabatic feedback
Which of the following is not associated with rising air motions?
a. overrunning b. convergence of air at the surface c. convergence of air aloft d. divergence of air aloft
Perforins are associated with which of the following?
A) B cells B) macrophages C) NK cells D) Th cells