Cancerous Cells Grade 10 Quiz

Explanation
Mutation is the random change in DNA because mutations occur spontaneously and can happen at any time during DNA replication or cell division. They are not directed or purposeful changes, but rather occur due to errors in DNA replication, exposure to mutagens, or other random events. These changes can lead to variations in genetic information and can have various effects on an organism's traits and characteristics.

Explanation
Carcinogens are indeed environmental factors that can cause cancer. They are substances or agents that can alter the genetic material in our cells, leading to the development of cancer. Exposure to carcinogens can occur through various means such as inhaling, ingesting, or coming into contact with these substances. Carcinogens can be found in various forms such as chemicals, pollutants, radiation, and certain infectious agents. Therefore, it is correct to say that carcinogens are environmental factors that can contribute to the development of cancer.

Explanation
The correct answer is lung, stomach, and ovary. These are three common types of cancer cells that can develop in different parts of the body. Lung cancer occurs in the lungs, stomach cancer occurs in the stomach, and ovarian cancer occurs in the ovaries. Each type of cancer has its own characteristics and treatment options.