What are the advantages of have DNA that is enclosed in a nucleus as opposed to DNA that is free in the cell?

Explanation: As the DNA is present in the nucleus, there is compartmentalisation and the process becomes more efficient without the interaction of external bodies. The membrane of the nucleus protects the DNA from injuries.

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when atoms of different types of elements join together, they make molecules called compounds. water consists of compound molecules made up of 2 hydrogen atoms and 1 oxygen atom. this is why it's called h2o. water will always have 2 times the number of hydrogen atoms as oxygen atoms.

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human impact on the environment can be seen in the deterioration of the !

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