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Transcript
Asexual and Sexual Reproduction Cells Book pp. 42 & 68 Microorganisms Text in the Middle Name: _____________________ Date: _______________ Hour: _____ Directions: Use the specified book and page numbers to answer the questions below. You will have to use both the cell book (you have) and the Microorganisms, Fungi, and Plants book (Classroom set). Cells p. 42 1. Describe the cell cycle. 2. What must happen before a cell divides? 3. What is DNA? 4. What is binary fission? Cells p. 68 5. What are the two methods of reproduction? a. b. 6. Sexual reproduction occurs in animals and not plants. True or False? 7. How many parent cells are needed for asexual reproduction? 8. Describe the process of asexual reproduction 9. What types of cells reproduce asexually? 10. How many parent cells are needed for sexual reproduction? 11. Describe the process of sexual reproduction. 12. Which type of reproduction produces offspring that are exact copies of their parents? 13. Which type of reproduction produces offspring that share traits with their parents but are not exactly like their parents? 1 14. What percent of your DNA comes from your mother? _____What percent of your DNA comes from your father? _____ 15. Dolly the Sheep (she is a cloned sheep) is an example of _______ reproduction. 16. Why is reproduction essential to the survival of every species? 17. Compare sexual and asexual reproduction using the following statements. Put a (+) if you think it’s an advantage and a (-) if you think it’s a disadvantage. o o o o o o o o o variety may help species survive genetic material passed to offspring one parent two parents offspring are identical to each other and parent (no genetic variation) offspring are not identical (genetic variation) need to find a mate no need to find a mate produces large numbers of offspring ASEXUAL REPRODUCTION SEXUAL REPRODUCTION Microorganisms Text in the middle 18. At the cellular level, what occurs during sexual reproduction? 19. Describe pollination. 20. How is pollen moved from one flower to another flower? 2 21. What is pollen? 22. At the cellular level, describe fertilization. 23. At the cellular level, what happens after fertilization? 24. How do fruits help a plant spread its seeds? 25. What are three structures plants use to reproduce asexually? 26. Describe how plants reproduce asexually using plantlets. 27. Describe how plants reproduce asexually using tubers. 28. Describe how plants use runners to reproduce asexually. 29. What do flowers and runners have in common? How do they differ? 30. When might asexual reproduction be important for the survival of some flowering plants 31. Sexual reproduction produces more genetic variety than asexual reproduction. Why is variety important? 32. Imagine that someone discovered a new flowering plant. The plant has yellow flowers and underground stems. How might this plant reproduce asexually? 3 33. Use the table below and place the following items where they belong. flatworms, bacteria, wolves, algae, cows, protist, starfish, humans, plant pollinated by another plant, sweet potato Asexual Reproduction Sexual Reproduction After viewing the brain pop, and using what you have learned in these sections, answer the following question. The answer is not found in the reading, you need to use your critical thinking skills. 34. Twins come in two varieties, fraternal (not genetically identical) and identical (genetically identical). Decide which is an example of sexual reproduction and which is an example of asexual reproduction. Explain your choice using what you know about each type of reproduction. 4