Question

multiple select question select all that apply which two of the following gases are the most important for biological activity in the oceans? helium argon oxygen carbon dioxide

Explanation:

Oxygen is crucial for the respiration of most marine organisms. Carbon - dioxide is important for photosynthesis by marine plants and phytoplankton, which form the base of the marine food - web. Helium and argon are inert gases and have little direct role in biological activity in the oceans.

Answer:

C. Oxygen, D. Carbon dioxide