Name: ___________________________________________ Date: __________________ Class: ________ Single-celled Organisms Sexual vs. Asexual Reproduction Watch this video: http://www.pbslearningmedia.org/resource/tdc02.sci.life.stru.singlecell/single-celled-organisms/ 1. What type of reproduction -- asexual or sexual -- do most single-celled organisms use? 2. What must a single-celled organism do before it can reproduce? 3. When a single-celled organism reproduces, what is the result? 4. In what ways, if any, does a single-celled organism differ from its parent? Flowering Plants Watch this video: http://ca.pbslearningmedia.org/resource/tdc02.sci.life.stru.floral/floral-arrangements/ 5. What type of reproduction -- asexual or sexual -- do most plants use? 6. What proportion of each parent plant's genetic material does each offspring plant have? Asexual Reproducers Watch this video: http://ca.pbslearningmedia.org/resource/tdc02.sci.life.repro.asexual/asexual-reproducers/ 7. What type of reproduction -- asexual or sexual -- do the whiptail lizards in the video use? 8. How many parents do whiptail lizards have? 9. How do young whiptail lizards differ from their parents, if at all? 10. How much of their parent's genetic material do whiptail lizards have? Red Queen Watch this video: http://www.pbslearningmedia.org/resource/tdc02.sci.life.evo.redqueen/the-red-queen/ 11. What are the differences between the two species of minnows featured in the video? 12. Which species -- the asexual or the sexual reproducers -- tends to be more heavily parasitized by the worm that causes black-spot disease? 13. How are the sexual reproducers able to evolve defenses against parasites more quickly and more effectively than their asexual counterparts? Summary 14. Discuss the advantages and disadvantages of sexual and asexual reproduction with your partner(s), and complete the table below by bulleting your ideas. Asexual Reproduction Sexual Reproduction Advantages Disadvantages 15. Which type of reproduction – asexual or sexual – do humans have? 16. What benefits do you think led to humans evolving this type of reproduction? Extension If you finish the assignment early, go to the following online interactive to see different organisms and how they reproduce: http://learn.genetics.utah.edu/content/basics/reproduction/ 17. Are there any that surprised you? Explain.
