Why Does Arabidopsis Have 5 Genes That Code for Phytochrome

question 22

Multiple Choice

Why does Arabidopsis have 5 genes that code for phytochrome?

• A) All 5 phytochrome absorb different types of light, maximizing sensitivity of plant to it.
• B) Some of the phytochromes do not function in light absorption, but regulate other processes.
• C) Several of them sense red light and the others sense far- red light.
• D) They mediate different types of responses to red/far- red light.

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