NEET BIOLOGY

Detailed explanation-1: -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. type of: tropism.

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: -A negative phototropism, also known as skototropism or scototropism, is when the organism tends to grow away from the source of light. The plant shoots and meristems, for instance, show positive phototropism. Plants are capable of responding to light in terms of growth with the help of different signaling molecules.

Detailed explanation-4: -tro·pism ˈtrō-ˌpiz-əm. : involuntary orientation by an organism or one of its parts that involves turning or curving by movement or by differential growth and is a positive or negative response to a source of stimulation. also : a reflex reaction involving a tropism. tropistic.

Detailed explanation-5: -When a plant exhibits some growth movement in response to a stimulus, it is referred to as tropism. Tropism is specific to the direction of the stimulus. Plants can either display a negative or positive movement in response to a stimulus.