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Q: explain two precautionary measures that you will consider when setting up the apparatus in phototropism
A: A tropism is a growth response of a plant to an external stimulus. A tropism can be positive or negative. Positive: the growth response is in the [ direction of the stimulus. Negative: the growth response is away from the stimulus. [ Light intensity, day length, gravity and temperature are major factors that influence plant growth. Phototropism is the growth response of a plant in response to
light direction. Geotropism is the growth response of a plant in response to gravity. Significance of Phototropism and Geotropism Stems Positive phototropism and negative geotropism of stems. The stems will grow towards the light and up away from gravity. This places the leaves in better light with increase in photosynthesis. More food means better growth and reproduction. Roots Negative phototropism and positive geotropism of roots. The roots grow away from light and down in the gravity of direction. The roots are more likely to find ?soil? in this direction. Soil is important for plants for anchorage, water and mineral nutrients. ]
torngal68|Points 30|
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Asked 5/26/2013 10:52:01 AM
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