Final answer:
Environmental agents that cause DNA changes are called mutagens. Many mutagens can also be carcinogens, which promote cancer development. Some common mutagens include radiation, chemicals, and infectious agents. Option A is the correct answer.
Step-by-step explanation:
The environmental agents that cause changes in the DNA of living cells are known as mutagens. A mutagen can be a physical or chemical agent that causes permanent changes to the genetic material, typically DNA, thereby increasing the frequency of mutations beyond the normal rate. While many mutagens are also carcinogens, or cancer-causing agents, not all mutagens necessarily lead to cancer. Examples of mutagens include radiation, certain chemicals, and infectious agents. Exposure to mutagens can lead to DNA damage, potentially resulting in uncontrolled cell division if not repaired, which could culminate in cancer.
Mutagens, encompassing physical or chemical agents, induce alterations in the DNA of living cells, elevating mutation frequencies beyond normal rates. While many mutagens double as carcinogens, not all provoke cancer. Radiation, certain chemicals, and infectious agents are examples of mutagens. Exposure to these agents can inflict DNA damage, posing a threat if unrepaired. If uncontrolled cell division ensues, the risk of cancer amplifies. Thus, mutagens play a pivotal role in the intricate relationship between genetic alterations and carcinogenesis, underscoring the importance of understanding and mitigating the impact of these environmental agents on the integrity of cellular genetic material.