Answer:
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Explanation:
2.6 grams per cubic centimeter
The answer is A and D. At first, they are confused with the structure. All they know is the DNA is consists of A, T, C and G. After they know the number relationship, they figure out that base may be pairs(A&T, G&C). Then the X-ray helps them to get the coiled helix structure.
<span>When a divergent boundary occurs under the ocean it is called oceanic ridge.</span>
Answer: D. The DNA sequences for the cytochrome c genes in chimpanzees and spider monkeys are over 90% identical.
Cytochrome c gene encodes for a protein that is very common among primates. This gene does not have undergone much changes during the process of evolution. Cytochrome c is a respiratory pigment found in the mitochondria of eukaryotes.
