25. The passage contains information that would answer which of the following questions about the carbon cycle?
I. What are some of the compounds that are broken down in the carbon cycle?
II. Why are some compounds that are involved in the carbon cycle less reactive than others?
III. What role do bacteria and fungi play in the carbon cycle?
I only
II only
III only
I and II only
I and III only
26. The author implies that which of the following is the primary reason that degradation is as important as synthesis to the smooth operation of the carbon cycle?
Most of the polymers and organic compounds found in the plant kingdom are chemically unstable.
The synthesis of some organic material deprives life processes of an energy source.
Decomposition permits the recycling of carbon that would otherwise be fixed in certain substances.
Many organisms cannot use plants as a source of food, but can feed on bacteria and fungi.
Bacteria and fungi could not survive if some carbon compounds were not degraded.
27. The authors contention about the importance of bacteria and fungi in the production of energy for life processes would be most clearly strengthened if which of the following were found to be true?
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