What best describes the nucleus of a atom?

Explanation:

The nucleus of an atom is a small dense region at the center of an atom that contains protons and neutrons. Almost all the mass of an atom is located in the nucleus, with a very small contribution from the electron shells

the answer is: metamorphic rocks often show the presence of fossils, also a

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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