DENDROLOGY

Detailed explanation-1: -(a) Cloudy days the rate of photosynthesis will decrease because sunlight is necessary for photosynthesis . On a cloudy day, threre will be less sunlight.

Detailed explanation-2: -If the temperature and light intensity is too high or low, there is an immediate decline in the rate of photosynthesis. Water supply and availability of essential minerals to plants an important role and affect the photosynthetic rate in terrestrial plants.

Detailed explanation-3: -Rate of photosynthesis is higher during the day because of the presence of sunlight, and during the process of photosynthesis plants take in carbon dioxide and give out oxygen. During the night, because of the lack of sunlight photosynthesis does not take place.

Detailed explanation-4: -The rate of photosynthetic absorption of carbon dioxide is higher during day times as compared to the rate of respiratory release of carbon dioxide. This results in the production of the greater amount of oxygen by photosynthesis than the amount needed for respiration. Hence there is build of oxygen in cells.

Detailed explanation-5: -Carbon Dioxide is decreased from the earth’s atmosphere during photosynthesis. During Photosynthesis carbon dioxide is taken by plants and they use it with sunlight and water sucked by roots for making glucose and releases oxygen in the air.