Question

Which of the following statements is true about the cycling of oxygen in a pond ecosystem? A. Oxygen cannot cycle because it binds irreversibly to other elements. B. Fish create oxygen through the process of cellular respiration. C. Oxygen cycles through the processes of photosynthesis and cellular respiration.

Answer 1

I think the answer could be ....C

Answer 2

The correct answer is option C- Oxygen cycles through the process of photosynthesis and cellular respiration.

In pond ecosystem, plants take up oxygen from air and the water to prepare their food though photosynthesis so does the animals that take their oxygen from water and respire. The pond animals take up oxygen and release carbon dioxide which is taken up by plants and they release oxygen. This is how the oxygen cycles in a pond ecosystem.