They make up everything needed to create DNA, although im not very sure, i think the answer your looking for is DNA.
Answer:
Dark colour.
Explanation:
Dark fur color seems to have the greatest selective advantage because of their hard physical body which occurs due to extreme environmental conditions. The dark colour of mice occurs due to the high intensity of sunlight which increases melanin in their skin. These dark colour mice pass through a very hard and extreme environmental conditions so that's why Dark fur color seems to have the greatest selective advantage.
Answer:
The answer is option A.
They belong to the same group of the periodic table.
Hope this helps
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