Answer:
Mass extincions have occured several times on Earth.
Explanation:
Im gonna ask someone for ya hold on
Answer:
The bases are the "letters" that spell out the genetic code. In DNA, the code letters are A, T, G, and C, which stand for the chemicals adenine, thymine, guanine, and cytosine, respectively. In base pairing, adenine always pairs with thymine, and guanine always pairs with cytosine.
Explanation:
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Answer:
Ao & oo
i don't really know if the answer is this....
