NEET BIOLOGY

Detailed explanation-1: -“Photo” means light, and “tropism” means turning. Phototropism is the phenomenon by which the plant bends in the direction of light.

Detailed explanation-2: -Definition of ‘phototropism’ 1. the growth response of plant parts to the stimulus of light, producing a bending towards the light source. 2. the response of animals to light; phototaxis.

Detailed explanation-3: -heliotropism an orienting response to the sun. neurotropism an affinity for neural tissues. tropism an involuntary orienting response.

Detailed explanation-4: -Phototropism combines the Greek photo, or “light, ” and tropism, “tendency of an animal or plant to move in response to a stimulus, ” from the Greek tropos, “a turning.” Definitions of phototropism. an orienting response to light.

Detailed explanation-5: -(a) The growth of plant parts in response to light is known as phototropism. An example of phototropism is the growth of plant stem in the upward direction in response to sunlight. (b) The stems of plants grow towards sunlight showing positive phototropism.