The liver of a dog has been found to have higher than normal cell death because the dna is damaged. what part of the cell failed to do its job of protecting the dna of the cell? a. nucleolus b. chromosomes c. nuclear envelope d. nucleus

The answer is Nuclear envelope.

Basically, the Nuclear envelope is an outer shell that protects the cell (which includes the dna) from any harmful things.

Nuclear envelope.

Explanation:

The nuclear envelope helps in protecting the nucleus from getting damage. The DNA resides in nucleus of the cell.

It is the main hereditary material which transfers the genetic materials from one generation to another generation.

If the nuclear envelope is damaged then the DNA inside it will be protected. So, to protect the DNA the nuclear envelope should not be damaged.

well, that's easy; the answer's c, "it reduces contamination of the water and substrate of the estuary."