NEET BIOLOGY

Detailed explanation-1: -Directed growth of roots in relation to a gradient in moisture is called hydrotropism and begins in the root cap with the sensing of the moisture gradient.

Detailed explanation-2: -The movement or the growth of a plant in relation to the stimulus of water is called hydrotropic movement and the equivalent response to the stimulus of water is called hydrotropism. In this type of movement, roots show positive hydrotropic response, as they move and grow towards the water.

Detailed explanation-3: -The movement of a plant in response to the concentration of water is known as hydrotropism.

Detailed explanation-4: -The correct answer is (a) Response to touch. Thigmotropism is a response in which a plant grows towards a touch stimulus. This is particularly important for plants like vines that grow up trees or other structural objects.

Detailed explanation-5: -Hydrotropism (hydro-“water"; tropism “involuntary orientation by an organism, that involves turning or curving as a positive or negative response to a stimulus") is a plant’s growth response in which the direction of growth is determined by a stimulus or gradient in water concentration.