Answer:
B-cDNA library made from the mRNA isolated from the crural gland of a male platypus
Explanation:
Okay. The destruction of tundra vegetation will not really freeze the soil or deepen the active zone much. Therefore, A and C are eliminated. The destruction of the vegetation can actually melt permafrost, which contributes to global warming. The answer is D.
Yes, it is one of the essential elements to life
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