Answer:
The answer is C.
Explanation:
At first, an enzymes called Helicase unwind the double helix in a DNA .
Answer:
Even the keeping of animals as pets represents a type of mutualism. Pet dogs (Canis familiaris) and cats (Felis catus) are fed and kept safe in domestication, while humans benefit from the companionship of these animals, and sometimes from other services, as when cats kill pest rodents.
Explanation:
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