Which part of photosynthesis is affected by excluding co2 from the plants environment?

Plants would not be able to synthesize glucose.

Explanation:

The photosynthesis requires carbon dioxide, water in the presence of sunlight to converted into glucose and release oxygen into the environment.

The If carbon dioxide would not be available during this process then the glucose would not be synthesized.

If there will be no glucose in the plants then the plants would die without food. The other organism would also die because the plant provide food to them.