The UV rays could harm the DNA of skin cells. Skin cancers begin when the said harm affects the genes’ DNA which control the growth of the skin cell. There are three main types of UV rays, the first one is called UVA rays. They can damage the DNA of skin cells and age them. They are connected to long-term skin damage, however they are also thought to cause some skin cancers. The second one is called UVB rays, they have a little more energy than UVA rays. They are thought to cause most skin cancers as well. They can immediately damage the DNA of skin cells. The third one is called UVC rays, they have a greater amount of energy than the other types of UV rays, however they don’t usually cause skin cancer.
One interesting example here is when you have a certian species of birds for example and all birds from one same species have a different pattern of how their wings and body is colored. This goes for dogs and other animals as well. All of these are examples how variation withing a species related to Darwin's theory of evolution.
The answer is Hox Genes. Just took the exam.
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The amount of matter is conserved when a substance changes form. When matter changes drastically it is not actually destroyed. This can be tested by weighing all the materials involved in an experiment before starting it, and again after the
Large companies know that their profit is based on how they interact with the different issues around the world. Companies want to know how to approach environmental issues to the community and to legislatures. They will hire lobbyist to provide the information needed to give their feedback. Lobbyist are people who are educated on many different topics and probably was legislatures themselves. Lobbyists work long hours especially if a bill is presented based on the topics of concern with the large companies.