UNIT 6 PHOTOSYNTHESIS

UNIT 6 PHOTOSYNTHESIS

6.1 REQUIREMENT OF PHOTOSYNTHESIS

All living things need energy to stay alive. Plants make their own food through a process called photosynthesis. To do photosynthesis plant need sun light, chlorophyll, carbon dioxide.

6.2 PROCESS OF PHOTOSYNTHESIS

- Carbon dioxide enters the leaves through the Stomata

- Water is absorbed by the roots and transported to the leaves.

- Oxygen produced during photosynthesis is given out by the plant through the Stomata into the surrounding air.

- Sugar produced during photosynthesis in the leaves is transported to all other parts of plant to be used as a food.

During photosynthesis, the energy from the sunlight is used to combine carbon dioxide and water to produce a sugar and oxygen.

6.3 STORAGE OF STARCH

Sugar is stored as starch if the plant produced sugar more than it can used.

The starch can be used as food when they cannot make  food at night time or winter.

Starch may be stored in stems, leaves, seeds, roots