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nataly862011 [7]
3 years ago
11

What is the main role of a hormone?

Biology
1 answer:
murzikaleks [220]3 years ago
5 0
I think its the second choice
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Mitochondrial DNA or mtDNA is DNA that found in the mitochondrial. Mitochondrial DNA only inherited from mother, so it's relatively unchanged than nuclear DNA that mixed from father and mother. 
Mitochondrial DNA has higher mutation rate in animals because it doesn't have repair mechanism like nuclear DNA. These mutations can be used as a clue for how close the relation of an organism to others.
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