48) incandescent light bulbs, which have high output of red light, are least effective in promoting a) photosynthesis. b) seed germination. c) phototropism. d) flowering. e) entrainment of circadian rhythms.

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01-12-2022
Biology

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48) incandescent light bulbs, which have high output of red light, are least effective in promoting a) photosynthesis. b) seed germination. c) phototropism. d) flowering. e) entrainment of circadian rhythms.

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SidHussain SidHussain · Answer 1 · 2022-12-05T15:37:59+01:00

Incandescent light bulbs, which have high output of red light, are least effective in promoting c) phototropism.

In the field of biology, phototropism can be described as the movement of parts of plants towards or away from light. Generally, the shoots of a plant are considered to be positively phototrophic as they move toward the light. On the other hand, roots are considered to be negative phototropic as they move away from light.

The red light that is present in incandescent light bulbs is the light that shows the least amount of effect of phototropism. This is because the pigments present inside the plant cells do not have a signal for the red light. Yellow light is the most favorable for plants to show phototropism.

To learn more about phototropism, click here:

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