Understanding Phototropism

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What is phototropism?
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Phototropism is the growth response of a plant in direction to a light source.
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Which plant hormone is primarily involved in phototropism?
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Auxin is the hormone that plays a major role in phototropism.
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How does auxin affect a plant's growth during phototropism?
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Auxin stimulates cell elongation on the side of the plant away from the light, causing the plant to bend towards the light.
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What type of phototropism causes a plant to bend towards a light source?
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Positive phototropism.
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What type of phototropism prompts roots to grow away from light?
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Negative phototropism.
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Which types of plants primarily display phototropism?
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Phototropism is primarily observed in shoots and leaves of all green plants.
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How does light affect auxin distribution?
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Light causes the redistribution of auxin to the shaded side, leading to asymmetric growth.
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Is phototropism an active or passive movement?
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Phototropism is an active movement as it requires energy.
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What environmental factor triggers phototropism?
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Light is the environmental factor that triggers phototropism.
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Can artificial light sources trigger phototropism?
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Yes, artificial light sources can also trigger phototropism.
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Why is phototropism beneficial for plants?
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It allows plants to maximize light absorption for photosynthesis.
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What is the difference between phototropism and gravitropism?
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Phototropism is a response to light, while gravitropism is a response to gravity.
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Which parts of the plant are typically involved in phototropism?
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The shoots and leaves are typically involved in phototropism.
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What is the role of photoreceptors in phototropism?
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Photoreceptors detect light and initiate signaling pathways that influence auxin distribution.
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Can phototropism occur in all directions?
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Phototropism typically occurs from the region facing the light source, depending on the angle and intensity of the light.
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