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enot [183]
3 years ago
7

Anyone know the answer to this question?

Biology
1 answer:
disa [49]3 years ago
7 0

Answer:

1. hydrogen; 2

2. it means two strands of DNA twisted around each other like a winding staircase

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How do human beings negatively affect the carbon cycle?
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Learn more: brainly.com/question/25123362

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