The rate of nutrient cycling in an ecosystem
A) depends only on the rate of photosynthesis.
B) depends only on the rate of decomposition.
C) does not depend on the rate of photosynthesis or the rate of decomposition.
D) depends on both the rate of photosynthesis and the rate of decomposition.
D
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Which plant hormone has mostly inhibitory
effects? a. auxin b. gibberellin c. cytokinin d. abscisic acid e. ethylene
A researcher suspects that the food in an ecosystem has been contaminated with radioactive phosphates over a period of months. Which of the following substances could be examined for radioactive phosphate to test the hypothesis?
A) the amino acids within proteins produced by organisms living in the area B) the starch produced by plants in the area C) the DNA of the organisms in the area D) All of the above are true.
Which list correctly orders the structures within the ear as they transfer a sound wave during hearing?
A) eardrum, hammer, anvil, stirrup, oval window, auditory canal B) eardrum, stirrup, hammer, anvil, oval window, auditory canal C) auditory canal, eardrum, hammer, anvil, stirrup, oval window D) auditory canal, eardrum, stirrup, hammer, anvil, oval window
Why are the data shown in Figure 17.7 below consistent, but not conclusive of runaway sexual selection?
What will be an ideal response?