NEET BIOLOGY

Detailed explanation-1: -Chemotropism is the movement of plants in response to a chemical stimulus. A classic example of this type of movement is the growth of the pollen tube towards the ovule, during fertilization, in a flower.

Detailed explanation-2: -Movement of plants in response to chemical stimuli is called chemotropism. In this case, chemical substance is a stimulus to which the plant can show two responses: i) It can move towards the chemical substance-positive chemotropism. ii) It can move away from chemical substance-negative chemotropism.

Detailed explanation-3: -Plant movement in reaction to chemical stimuli is known as chemotropism. The growth response is positive chemotropism when it is directed toward the stimulus. When the growth response is away from the stimulus, it is called negative chemotropism. Example: Growth of pollen tubes towards ovules.

Detailed explanation-4: -Chemotropism is the movement of plant parts in response to chemicals. Thus, the stimulus for chemotropism is “Chemicals”.

Detailed explanation-5: -Chemotropism is known as growth or movement of a complete plant or plant parts towards the chemical stimulus. For example the growth of pollen tube down to the ovule in the ovary through the stigma and style during fertilization in order to respond to the presence of sugars in the style.