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Date: _____________________ Chapter 2.3: How Cells Reproduce 1. Where do all cells come from? _____________________________________________ 2. A) What is regeneration? __________________________________________________ _______________________________________________________________________ B) What type of animals have this ability? _____________________________________ C) Do humans have this ability? Explain. ______________________________________ _______________________________________________________________________ 3. A) Do all cells grow and divide at the same rate? ________________________________ B) What cells live for a very short period of time? _______________________________ C) What cells live for a very long period of time? _______________________________ Mitosis 4. A) What is a chromosome? _________________________________________________ _______________________________________________________________________ B) How many chromosomes does a normal human have? _________________________ C) What cells in the human body have only half this number? I) _________________ II) ________________ D) Chromosome combination for I) Human Female_______ II) Human Male _______ 5. Does the number of chromosomes have anything to do with organism complexity?_____ A) beaver_______ B) carp ________ C) elephant_______ D) fern_______ E) radish_______ F) yeast_________ 6. What does the acronym DNA stand for? _______________________________________ _______________________________________________________________________ 7. What is Mitosis? _________________________________________________________ _______________________________________________________________________ 8. Label in the following diagram of the 4 phases of cell division. Give a brief summary of the main events in each section. How Rapidly Do Cells Divide? 9. A) How long do the following cells take to divide I) bacterium _______ II) A frog embryo cell? ______ III) A liver cell?________ B) Under ideal conditions, how many cells could one bacteria cell divide into in; I) 3 hours? II) In 4 hours? Cells and Cancer 10. A) What is cancer? _______________________________________________________ _______________________________________________________________________ B) Why does cancer sometimes cause death? ___________________________________ _______________________________________________________________________ _______________________________________________________________________ 11. What is a carcinogen? _____________________________________________________ _______________________________________________________________________ ex._____________________________________________________________________ 12. A) What are the 3 most common types of cancers in Canada for women? _______________________________________________________________________ B) What are the 3 most common types of cancers in Canada for men? ______________________________________________________________________ 13. In theory, how is cancer treated? _____________________________________________ _______________________________________________________________________ 14. What are some of the treatments options available? I) ___________________: _____________________________________________ II) ___________________: _____________________________________________ III) ___________________: _____________________________________________