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BARSIC [14]
2 years ago
12

Consider a plant that grows best in bright sunlight in which seed germination is controlled by phytochromes. Which of the follow

ing statements describe(s) the structure and function of phytochromes in this plant? a. When a phytochrome in the Pfr configuration absorbs far-red light, the phytochrome reverts to the Pr configuration. b. Far-red light stimulates the plant seeds to germinate when the phytochrome is in the Pfr configuration. c. The plant seeds are more likely to germinate after exposure to red light than after exposure to far-red light. d. The effects of red and far-red light on phytochromes are irreversible. e. Phytochromes absorb red light and far-red light equally when the phytochrome is in the Pfr configuration. f. Phytochromes absorb red light maximally when the phytochrome is in the Pr configuration. g. Phytochromes contain photoreceptors.
Biology
1 answer:
ddd [48]2 years ago
3 0

Answer:

The answer is c) The plant seeds are more likely to germinate after exposure to red light than after exposure to far-red light

Explanation:

Phytochromes are involved in the biological cycle of the plant, from germination to flowering and tubing. The red light (660 nm) activates the phytochrome, while the ultra-red or far red light (730 nm) inactivates it. In both positive photoblastic seeds (response of the seeds to light) and in the negative photoblastic seeds the red light stimulates germination, while the distant red light inhibits it.

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