16. immunity that can be acquired naturally, such as when we are exposed to a bacterial or viral infection (such as measles), or that can be acquired artificially, such as when we receive a vaccine, is known as

Adaptive immunity

Explanation:

The adaptive immunity is also known as acquired immunity. It is a sub system of the overall immunity.

It can defined as the immunity which is not present in the body when we are born. It develops in the body when it is exposed to the pathogens no matter it is natural or artificial.

The acquired immunity can develop in the body and makes the body susceptible to infections and develops prevention for the next time when the body will be exposed for the next time.

the answers are as following:

1. c. double helix, nucleosome, coil, supercoil, chromosome

2. b. g2 phase, preparation for mitosis

3. d. interphase consists of the g1, s, and g2 phases

4. c. metaphase

5. a. chromosomes are duplicated before cell division so that each new daughter cell has a complete set