I positive that the answer id D why because Without<span> them the Earth </span>would<span> be too cold for us, or any other living thing, to survive. Naturally occurring </span>greenhouse gases<span>, such as carbon dioxide and methane, allow solar radiation to reach the Earth's surface, while trapping radiation from the Earth on its way back out to space.
Hope I helped
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Answer:
A. True
Explanation:
Yes, the plants use cellular respiration. So, option (A) is the correct answer.
The correct answer is A: the repressor protein is inactive
Without tryptophan, the repressor protein recedes into inactivity.
D. I think answer colorectal