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Marrrta [24]
3 years ago
7

Sample 1 sample 2 sample 3 sample 4

Biology
1 answer:
Leto [7]3 years ago
5 0

Answer:

Sample 1

Explanation:

Dna contains carbon, hydrogen, oxygen, nitrogen, and phosphorus. These make up the sugar-phosphate backbone of the DNA also known as the sides of the ladder.

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