Golgi apparatus, endoplasmic reticulum, and ribosomes
An antigen is recognized by lymphocytes to be foreign and causes an immune response. It is important to know about the immune system of the body as well. The immune system is the system that recognizes and defends itself against any viruses, bacteria or any other harmful foreign bodies.
Answer:
The first question is "It is used for cell processes or released as heat."
Sedimentary rock forms *over time,* which means that those rocks had to form over millions of years, proving that the Earth has been forming and changing all this time.