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Question
Biology
Posted 9 months ago
What is phototropism? Briefly describe this phenomenon, specifying the
differences between positive and negative phototropism, and giving examples of both
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Answer from Sia
Posted 9 months ago
Answer
Phototropism is the growth response of a plant in relation to light direction.
Solution
a
Phototropism: This phenomenon involves the growth of plant organs towards or away from light. It is a type of tropism, which is a directional growth response to an external stimulus
b
Positive Phototropism: This occurs when plant parts grow towards the light source. An example is the growth of plant stems and leaves towards sunlight to maximize photosynthesis
c
Negative Phototropism: This occurs when plant parts grow away from the light source. An example is the growth of roots away from light, which helps them to anchor the plant and absorb water and nutrients from the soil
Key Concept
Phototropism
Explanation
Phototropism is a plant's growth response to light, where positive phototropism involves growth towards light (e.g., stems and leaves), and negative phototropism involves growth away from light (e.g., roots).
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