Which of the following is NOT a characteristic of the world’s great forests?Which of the following is NOT a
characteristic of the world’s great forests?
a. They produce greenhouse gases.
b. They absorb and release water.
c. They control soil erosion.
d. They control flooding.
e. They control sediment buildup in fresh water sources.
ANSWER: a
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In the natural carbon cycle, carbon dioxide is returned to the atmosphere by the respiration of animals and chemoorganotrophic microorganisms
Indicate whether the statement is true or false.
At which of the following time points in an action potential is a positive feedback process occurring in a neuron?
A. When the neuron is at rest. B. As the neuron is being depolarized and passes the threshold potential. C. After the peak depolarization of the action potential when it is rapidly repolarizing. D. During the undershoot phase when the neuron is slightly hyperpolarized relative to the resting potential. E. A positive feedback process is occurring at all the time points given.
Sperm are produced in the
a. epididymis. b. seminiferous tubules. c. penis. d. prostate gland. e. Vas deferens.
Decomposers perform their recycling efforts on organisms
a. at the end of a food chain. b. on the top of a pyramid. c. that are producers. d. that are consumers. e. all of these.