What produces identical nuclei in cells

Why is it important to reduce the number of chromosomes in half when forming gametes for sexual reproduction?

3points hurry! what is the relationship between biotechnology, sharkskin, and disease resistance? bioengineers have developed an artificial sharkskin that does not allow resistant bacteria to grow on it. disease-causing microbes have been genetically modified to keep them from infecting the skins of sharks. scientists have created a device that can be attached to the skins of sharks that dramatically increases their abilities to resist disease. sharkskin produces many chemicals that can be collected and used to create antibiotics.

Suppose you were the commissioner of corrections for your state. which correctional activities might come within your domain? which mostly would not