NEET BIOLOGY

Detailed explanation-1: -A plant laid on its side in the dark will send shoots upward when given enough time. Gravitropism ensures that roots grow into the soil and that shoots grow toward sunlight. Growth of the shoot apical tip upward is called negative gravitropism, whereas growth of the roots downward is called positive gravitropism.

Detailed explanation-2: -Gravitropism is based on the redistribution of auxin in the elongation zone of the developing root. If the root is not growing vertically downward, then auxin accumulates in the lower parts of the root, inhibiting cell elongation and causing the root to bend in the direction of gravity.

Detailed explanation-3: -Gravitropism is the ability of plants to perceive and respond to the gravity vector and orient themselves accordingly.

Detailed explanation-4: -Well, It is a phenomenon that is called “Gravitropism". Gravitropism is either positive which means “with gravity” or negative gravitropism which means against gravity. It is said that plant and fungi both have negative gravitropism i.e. both of them grow upwards.