Plant movement in response to diffuse stimulus of light isa)Phototropismb)Photolysisc)Phototaxisd)PhotonastyCorrect answer is option 'C'. Can you explain this answer?

Question

Answer

Phototropism is the growth of an organism in response to a light stimulus. Phototropism is most often observed in plants, but can also occur in other organisms such as fungi. The cells on the plant that are farthest from the light have a chemical called auxin that reacts when phototropism occurs

Answer

Complete answer:

> Option A, Phototropism is the growth of theplants or other organism in the response to the stimulus of the light. The cells which are present at the furthest side of the source oflight elongate and the plant moves towards the stimulus of the light.

Answer

Phototaxis is the correct answer to the given question.

Phototaxis is a type of plant movement in response to a diffuse stimulus of light. It is a directional movement of an organism towards or away from a light source. In plants, phototaxis is commonly observed in the growth and movement of shoots and roots.

Plant movement in response to light is an important adaptive response that allows plants to optimize their exposure to light for photosynthesis. It helps plants to orient themselves in a way that maximizes their ability to capture sunlight, which is essential for their growth and development.

Here is a detailed explanation of why phototaxis is the correct answer:

1. Phototropism:
Phototropism is the growth or movement of a plant in response to the direction of light. It involves the differential growth of plant cells on the side exposed to light, causing the plant to bend towards the light source. Phototropism is not a response to diffuse light but rather a response to the direction of light.

2. Photolysis:
Photolysis is a chemical reaction that involves the splitting of a molecule using light energy. It is not directly related to plant movement in response to light but rather a process that occurs within the plant cells.

3. Phototaxis:
Phototaxis is the movement of an organism in response to a light stimulus. It can be either positive phototaxis (movement towards light) or negative phototaxis (movement away from light). In plants, phototaxis is commonly observed in the growth and movement of shoots and roots. Plants exhibit positive phototaxis, where they grow towards a light source, as they need light for photosynthesis.

4. Photonasty:
Photonasty refers to non-directional plant movements in response to light. It involves the changes in the orientation of plant parts in response to light, but these movements are not directed towards or away from the light source. Examples of photonastic movements include the opening and closing of flowers in response to light.

In conclusion, phototaxis is the correct answer to the given question as it refers to the movement of plants in response to a diffuse stimulus of light. Phototaxis allows plants to grow towards a light source, optimizing their exposure to light for photosynthesis.

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