NEET BIOLOGY

Detailed explanation-1: -One important light response in plants is phototropism, which involves growth toward-or away from-a light source. Positive phototropism is growth towards a light source; negative phototropism is growth away from light.

Detailed explanation-2: -The process of growing plants toward a light source is known as positive phototropism. Positive phototropism is found in the shoot system, which includes the leaves, flowers, stems, lateral buds, and other elements that extend above the ground.

Detailed explanation-3: -The bending of plant towards light is known as phototropism. It is due to plant hormone auxins. When the growing parts of a phototropic plant detect sunlight, auxins (synthesized at the shoot tips) help the cells grow longer.

Detailed explanation-4: -Stems are positively phototropic. Roots are negatively phototropic.

Detailed explanation-5: -Specifically, stems exhibit positive phototropism, or curvature toward the light, while roots show negative phototropism, or curvature away from the light.