Plants breathe through the stomata. Stomata are the tiny openings mostly present on the surface of leaves. The leaf takes in carbon dioxide and gives out oxygen through these openings. It also helps in the process of transpiration.

Bleaching is a process involved in the iodine test. The iodine test is used to identify the presence of starch in leaves. Bleaching is the process of removing chlorophyll from a leaf. For this, the leaf should be boiled in water and then in alcohol.

Leaves are known as the kitchen of the plant as they make food for the plants. Leaves are green in colour due to the presence of a green pigment called chlorophyll. It is essential for the process of photosynthesis. It helps to absorb sunlight.