1ST QUESTION: What is TRUE about normal cells?

Normal cells do not function appropriately in the tissue or organ they are a part of.
Normal cells do not obey genetic instructions to stop growing and dividing.
Normal cells contain damaged genetic material.
Normal cells do not move from one organ or body system to another.

2ND QUESTION: Which of the following is a characteristic of a benign tumor?
It invades surrounding tissues.
It is harmless.
It is surrounded by a capsule.
It causes pain when it presses on a nerve.

3RD QUESTION: Which of the following is NOT an environmental factor that causes cancer?
humanpapilloma virus (HPV)
certain drugs or chemicals
radiation
a mutation in the BRCA1 gene