A primary source of carbon for photosynthetic organisms is
A) carbon dioxide in the atmosphere and water.
B) bicarbonate in the water.
C) nitrate in the soil.
D) dissolved phosphate in water.
E) carbonic acid in rain.

Question

Quizplus · Accepted Answer

Photosynthetic organisms primarily use carbon dioxide from the atmosphere and water as their carbon source for photosynthesis.

A Primary Source of Carbon for Photosynthetic Organisms Is