NEET BIOLOGY

Detailed explanation-1: -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-2: -This process is known as hydrotropism, which is easy to remember as the prefix hydro-means water. Both plants are showing positive hydrotropism as their roots are growing toward water and not away from it. Therefore, the tropism being displayed positively by the roots is hydrotropism.

Detailed explanation-3: -Usually, roots grow towards the water and exhibit positive hydrotropism, while shoots grow against the water and exhibit negative hydrotropism.

Detailed explanation-4: -The response may be positive or negative. A positive hydrotropism is one in which the organism tends to grow towards moisture whereas a negative hydrotropism is when the organism grows away from it. An example of positive hydrotropism is the growth of plant roots towards higher relative humidity level.

Detailed explanation-5: -Roots also exhibit positive hydrotropic growth in response to moisture gradients, which has long been considered to contribute to drought avoidance (Knight 1811). Phototropism and gravitropism have been studied extensively, whereas there are fewer studies on the mechanisms mediating root hydrotropism.