NEET BIOLOGY

Detailed explanation-1: -The effect of gravity on the direction of plant growth is called gravitropism. (The effect of gravity on plant growth is often called geotropism because the Earth itself (geo) is responsible for the stimulus.

Detailed explanation-2: -What is Geotropism? The tropic movement in response to the earth’s gravity is called geotropism or gravitropism. Plant gravitropism can either be a positive or a negative response. Unilateral gravity causes curvature in the region of elongation of stem and root.

Detailed explanation-3: -Have you heard of gravitropism? It’s the unique ability of plants to sense gravity, and respond accordingly. In other words, it’s how a plant knows to point its roots downward.

Detailed explanation-4: -Phototropism is the growth of an organism in response to a light stimulus. Phototropism is most often observed in plants, but can also occur in other organisms such as fungi. The cells on the plant that are farthest from the light contain a hormone called auxin that reacts when phototropism occurs.

Detailed explanation-5: -Phototropism: Response to light In this, the plant grows in the direction of light. The plants have a chemical called auxin, which reacts in response to light. This causes the cells of the plants to elongate. Growth towards light is positive phototropism, while that away from the light is negative phototropism.