Question

which of the following would have the least effect on photosynthesis? oxygen levels of the air temperature of the environment carbon dioxide levels of the air amount of water available in the environment

Explanation:

Photosynthesis is the process by which plants use light energy to convert carbon dioxide and water into glucose and oxygen. Temperature affects the rate of enzyme - catalyzed reactions in photosynthesis. Carbon dioxide is a reactant in the Calvin cycle (light - independent reactions) of photosynthesis. Water is also a reactant (in the light - dependent reactions, where water is split). Oxygen is a by - product of photosynthesis. While changes in oxygen levels can affect other biological processes (such as respiration), it has a relatively minor direct impact on the photosynthetic process itself compared to the other factors (temperature, carbon dioxide, and water).

Answer:

oxygen levels of the air