AP BIOLOGY

Detailed explanation-1: -In phototropism a plant bends or grows directionally in response to light. Shoots usually move towards the light; roots usually move away from it.

Detailed explanation-2: -When a plant receives sunlight from only one direction, the shoot of that plant bends in the direction of the sunlight. This is because of the hormone auxin which accumulates in the side where sunlight is not present.

Detailed explanation-3: -Hormones in the plant’s tissues, called auxins, make cells on the dark side of the plant grow taller, bending the plant toward the light.

Detailed explanation-4: -Phototropism. Plant shoots display positive phototropism: when illuminated from one direction, the shoot proceeds to grow in that direction.

Detailed explanation-5: -"Even mature plants bend toward the strongest light. They do this by elongating the cells of the stem on the side that is farthest from the light. This type of light-oriented growth is called phototropism, ” explains Prof.