1. Mutations to DNA cause changes in organisms. Explain why this might be important to the survival of a spcies?
2. Why is it important to be protected with a lead shield when you are getting dental X rays?
3. Why can suntanning be dangerous for a skin cell?
help is greatly appreciated!~!
1.
http://en.wikipedia.org/wiki/Mutation
2.
http://en.wikipedia.org/wiki/Lead_shielding
3.
http://en.wikipedia.org/wiki/Skin_cancer
http://www.hawaiiantan.com/qvc.htm
1. Mutations in DNA can be important to the survival of a species because they introduce genetic variations. Genetic variations provide the raw material for natural selection and evolution to occur. When the environment changes, certain mutations may provide an advantage to individuals within a population, allowing them to better adapt and survive. These individuals have a higher chance of passing on their genetic traits to the next generation, resulting in the propagation of beneficial mutations. Additionally, genetic diversity within a population can also help protect against potential threats such as diseases or changing environmental conditions.
To understand why mutations are important for survival, one could study the principles of genetics, natural selection, and evolution. This can be done by exploring the works of scientists like Gregor Mendel, Charles Darwin, or even by taking courses in biology or evolutionary genetics.
2. It is important to be protected with a lead shield during dental X-rays to minimize exposure to ionizing radiation. Dental X-rays use high-energy radiation to capture images of the teeth and surrounding structures. Although the dose of radiation used in dental X-rays is relatively low, repeated exposure can still pose some risks.
To understand why it is important to protect against ionizing radiation, one can delve into the principles of radiation biology and its effects on living tissues. This can be studied through resources such as radiation safety guidelines from reputable organizations like the International Atomic Energy Agency (IAEA) or the National Council on Radiation Protection and Measurements (NCRP).
3. Suntanning can be dangerous for skin cells due to the harmful effects of ultraviolet (UV) radiation. UV radiation from the sun can penetrate the skin and damage DNA within skin cells. This damage can lead to mutations and increase the risk of developing skin cancer.
To understand why suntanning can be dangerous, one can explore the principles of UV radiation and its effects on the skin. Researching topics such as the different types of UV radiation (UVA, UVB, UVC), the structure of the skin, and the various cellular mechanisms that occur upon UV exposure can provide a comprehensive explanation. Resources such as scientific articles, dermatology textbooks, or reputable health websites like the American Academy of Dermatology can provide valuable insights.