NEET 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: -Phototropism, or the differential cell elongation exhibited by a plant organ in response to directional blue light, provides the plant with a means to optimize photosynthetic light capture in the aerial portion and water and nutrient acquisition in the roots.

Detailed explanation-3: -Sunlight provides the energy plants need to convert carbon dioxide and water into carbohydrates and oxygen. The carbohydrates produced by photosynthesis are used for vegetative and reproductive growth and to increase crop biomass. Because solar energy is needed for photosynthesis, it only occurs during daylight.

Detailed explanation-4: -Results. The control plants will do better than the plants that are only exposed to one wavelength of light. The plants will grow better in red and blue light than in green light. The plants will grow toward red and blue light but will not move toward the green light.

Detailed explanation-5: -Sunlight is required for photosynthesis. The shoot of the plant bends towards sunlight to synthesize its food. This type of movement is called as a phototropic movement.