Question

question 20 of 25
what would happen if photosynthesis could no longer occur on the planet?
a. less carbon dioxide would be produced.
b. food chains would become stable.
c. remaining oxygen would be used up.
d. less energy would come from the sun.

Explanation:

Photosynthesis produces oxygen. Without it, oxygen would be consumed by respiration and other processes until depleted. Option A is wrong as photosynthesis consumes carbon dioxide, not produces it. Option B is incorrect because food chains rely on producers (which use photosynthesis). Option D is wrong as the Sun's energy input isn't directly affected by lack of photosynthesis (though its utilization by organisms is).

Answer:

C. Remaining oxygen would be used up.