(b) What will happen to the rate of photosynthesis in a plant under the following circumstances?
Answer: (a) Cloudy days the rate of photosynthesis will decrease because sunlight is necessary for photosynthesis. On a cloudy day, there will be less sunlight. (b) No rainfall in the area the rate of photosynthesis will decrease because water is one of the raw material needed by plant for photosynthesis.