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Sav [38]
3 years ago
13

.

Biology
1 answer:
Nadya [2.5K]3 years ago
7 0

Answer:

The gravitational attraction between the sun and Earth

Explanation:

because of the gravity.

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If a double-stranded segment of DNA has been found to have 23 purines and 15 thymines, how many guanines are there?
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We are then left with 8 nucleotides composed of guanines and cytosines in complementary base pairs. This means that half that number (4) should be guanines and the rest cytosines.

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What is meant by the term “essential” amino acids, what is essential about them? Put in your own words
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