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ki77a [65]
3 years ago
6

1.

Biology
1 answer:
MAVERICK [17]3 years ago
4 0

Answer:

1. Purines

2. States that DNA composition varies among species

3. Hydrogen Bond

4. Purines

<em>Answer to #2 is a little iffy </em>-- sorry

Explanation:

Pyrmidines have two rings

Purines have one ring

Complementary bases are connected by hydrogen bonds.

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