Can you re-word better? i'm having a hard time reading this.
In many cells, the structure that controls the cell's activities is the nucleus.
Scientists use radioactive decay to date fossils and artifacts through a process called carbon dating it measures the amount of carbon still left in a dead object. The less carbon that exists, the longer that animal or plant as been dead.
Answer:
the DNA, chromosome, and gene can all be similar in some way
