To cause cancer, proto-oncogenes require _____ allele(s) to be mutated and therefore are considered ________. The mutation results in a ___ of function.

Who is considered the predominant theorist in cognitive development?

Please conduct a research online about “Cancer” to answer the following questions.

1. What is the definition of cancer?
2. What do cancer cells not have that other cells do?
3. What do cancer cells do more often than other cells?
4. What are tumors?
5. What is the term for tumors that can invade healthy tissue?
6. What does it mean for tumors to be malignant?
7. What does it mean for tumors to be benign?
8. What is the name for a mass of cells that are not cancerous, but not normal?
9. What is the term for an increase in the number of normal cells?
10. What is the term for the presence of abnormal cells that are not cancer?
11. What must have occurred for cancer to develop?
12. What can spontaneously cause mutations in cells leading to cancer?
13. What can damage DNA?
14. What are the possible treatments of cancer (check textbook or online)?

Why does rain water considered distilled?