Many human skin tumors contain mutated p53 genes that probably result from excess UV exposure. One of 10 different equally likely mutations of the p53 gene always results from a single episode of excessive UV exposure; the 10 mutations remain equally likely over repeated exposures. A p53 gene must experience all 10 mutations before a tumor can develop. Assume that only one mutation can occur as a result of one excessive UV skin exposure. Question 2. How many excessive UV exposures would you expect are required until the p53 gene has experienced all 10 mutations

Dermal tissue in plants stores 1.extra food 2.transports water and nutrients 3.transports waste materials 4.is similar to epithelial cells in animals

Name the glands associated with human digestive system

1. -define adaptation2 explain darwin's theories of descent with modification and natural selection in detail3. -explain how each of these provides evidence for evolution: a. -fossil record, including superposition and transitional fossilsb-anatomy, including homologous structuresc-biological molecules, including dna and proteins4. -explain the difference between convergent and divergent evolution.5. -define and give three examples of artificial selection6. -define and give one example of coevolution.7. -explain biodiversity and how it benefits humans.8. -explain a type of population lest affected by environmental change.