Question

Discuss the sources and functions of raw materials required for photosynthesis

Answer 1

Answer:

The sources are sunlight, chlorophyll (present in green leaves), carbon-dioxide (from air) and water (from soil)

Function of sunlight: The sunlight is used to convert carbon-dioxide and water into glucose (which is food for the plants).

Function of chlorophyll: Chlorophyll absorbs the sunlight.

Function of carbon-dioxide: Carbon-dioxide is mixed with water to form glucose.

Function of water: Water is mixed with carbon-dioxide to form glucose.

Answer 2

Answer:

Sources of raw materials required for photosynthesis:

(a) Water is taken in from the roots of the plant and is transported to the leaves.

(b) Carbon dioxide from the air enters the leaves through the tiny pores called stomata and diffuses to the cells containing chlorophyll.

(c) Solar energy is used to break water into hydrogen and oxygen. This hydrogen is combined with carbon dioxide to form food for the plants, which is ultimately used by the animals as well.

Thus, photosynthesis can be represented by the following equation.