Answer: a nucleus is like a sun because it has planets surrounding it and it is the center of a solar system like a nucleus is the center of the cell. hope this helps you a little
Explanation:
Universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago.
The nervous system.~~~
And in the nervous system is the nucleus.....the organelle responsible.
And inside the nervous system is the RNA and DNA that helps sending the information.
Answer:
chemical reactions.
Explanation:
Chemical changes occur when a substance combines with another to form a new substance, called chemical synthesis or, alternatively, chemical decomposition into two or more different substances. These processes are called chemical reactions and, in general, are not reversible except by further chemical reactions.
