NEET BIOLOGY

Detailed explanation-1: -Geotropism: When a natural object moves in response to gravity, it’s called geotropism. As an example, roots of a plant move in a very downward direction, so that they show positive geotropism and stem moves within the upward direction, so it shows negative geotropism.

Detailed explanation-2: -Positive geotropism refers to the downward growth of plants, going with the force of gravity. Positive geotropism is seen in the roots of plants because the roots of plants grow downward with the force of gravity.

Detailed explanation-3: -Geotropism is the movement or growth of plant parts in response to the force of gravity. Stems of the plant show negative geotropism while the roots show positive geotropism.

Detailed explanation-4: -when a root grows in the direction of the force of gravity, this is known as a positive geotropism. Just like phototropism, gravitropism, or geotropism, is also caused by an unequal distribution of auxin.

Detailed explanation-5: -Charles Darwin was one of the first to scientifically document that roots show positive gravitropism and stems show negative gravitropism. That is, roots grow in the direction of gravitational pull (i.e., downward) and stems grow in the opposite direction (i.e., upwards).