NEET BIOLOGY

Detailed explanation-1: -The effect of light intensity on photosynthesis can be investigated in water plants. Use Cabomba or Elodea, which are sold in aquarium shops. The plants will release bubbles of oxygen-a product of photosynthesis-which can be counted.

Detailed explanation-2: -An increase in light intensity will produce an increase in the rate of photosynthesis until a level of light intensity is reached [normally 38% 1] above which the rate does not increase because the light saturation point has been reached and another factor (CO2 concentration or temperature) is limiting.

Detailed explanation-3: -Like other green plants, pond weed can make sugar from carbon dioxide and water. When this happens, oxygen is also made. This oxygen comes out of the plant and can be seen as bubbles in the water around the pond weed.

Detailed explanation-4: -Light is one of the factors which affects the rate of photosynthesis. In this investigation a green plant named Canadian pondweed (Elodea) will produce bubbles of oxygen as a result of photosynthesis. The number of bubbles of oxygen produced is affected by light intensity.

Detailed explanation-5: -The rate of photosynthesis increases as light intensity increases: The greater the light intensity, the more energy supplied to the plant and therefore the faster the light-dependent stage of photosynthesis can occur.