Explain why epithelial cells are the source of 80% to 90% of all cancers. Then list at least two types of epithelial cells, and at least four types of cancer for which they are the source
What will be an ideal response?
Epithelial cells divide more or less continuously throughout an individual's life. Therefore, there is a higher probability that one or more mutations will occur during the cell division process than there is within a cell that undergoes fewer cell divisions. Intestinal lining, duct cells, and skin cells are examples of epithelial cells. Skin, breast, prostate, colon, and lung cancers are all examples of epithelial cell sources of cancer.
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Refer to Figure 51-3. The amnion is identified by number:a
1. b. 2. c. 3. d. 4. e. 5.
Compare and contrast DNA and RNA. Include the similarities and differences in their chemical composition and
structure, as well as their general roles within the cell. What will be an ideal response?
A vector is
A. the organism that causes a disease. B. the organism that is harmed by a disease organism. C. the organism that carries a disease organism from one host to another. D. the organism that produces antibiotics.
Bacteria differ from viruses in that bacteria
A) Have DNA and RNA. B) Are composed of cells. C) Can live without a host. D) All of the above.