Answer:
keratin
Your nails are made of keratin
Keratin is a type of protein that forms the cells that make up the tissue in nails and other parts of your body.
Explanation:
Answer: Carcinogens
Explanation:
Carcinoids refer to a specific type of slow growing tumor, tumors are the cancerous growths within a body, and sarcomas are tumors that occur in bones and soft tissues.
I have no idea search it up in google
Saliva,unprotected intercourse,contact with infected blood (blood transfusion)
and women with an unborn child.
He discovered that cells come from cells that already exist