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Name: Hour: Cardinal Heights Biology Number: Evolution by Natural Selection (BSCS Biology: pg. 114-118) 1. With many before Darwin proposing the basic idea of evolution. How were his findings unlike earlier scientist? ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ ________________________________________________________________________________ 2. List some examples of different traits that are passed down from generation to generation that would added variation to a population. ______________________________________________________________________________________ 3. What are 2 examples of humans selecting for particular traits in different plants and animals. ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ 4. Why are horse and donkeys considered two separate species? ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ 5. Read the observations that lead up to Darwin’s theory of evolution and determine if they are True or False. True or False: In the absence of limits to population growth (like a predator or disease) organism reproduce very quickly. True or False: This is supported by evidence in nature. Populations in nature keep getting bigger and bigger. True or False: In nature, there is almost always a limit to the amount of resources. 6. How did Thomas Malthus’s essay influence Darwin’s views about population growth and size? ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ 7. Describe Darwin’s final inference concerning the struggle for existence among a population of organism. (Hint: Think only the strong survive . . . ) ______________________________________________________________________________________ ______________________________________________________________________________________ 1 Name: Hour: Number: Cardinal Heights Biology 8. How do adaptations relate to natural selection? ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ 9. What is the difference between selective breeding and natural selection? ______________________________________________________________________________________ ______________________________________________________________________________________ 10. What are the three factors that affect natural selection? ____________________________ ____________________________ ____________________________ 11. What determines an organism’s ability to survive and reproduce in the face of pressures (ex. competition and predation)? ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ 12. Where do the characteristics organisms need to survive come from? ______________________________________________________________________________________ 13. True or False: An individual can evolve to become a new species. 14. How do different species result from natural selection? Use the terms: population, characteristics, natural selection, and ancestor in your response. ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ 15. How does natural selection relate back to Darwin’s Decent by Modification theory? ______________________________________________________________________________________ ______________________________________________________________________________________ 16. Wrap up question: Describe how exactly natural selection works and what it may result in. Use the following terms in your answer: variation, selection, inheritance, survival, reproduction, and beneficial traits. (Hint: Think of the example of the rabbits) (Application) ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ ______________________________________________________________________________________ 2 Name: Hour: Cardinal Heights Biology Number: Vocabulary Fill in the following chart using your reading and reading guide. You need to understand these vocabulary terms in order to fully understand the reading and/or biology content. Word Formal Definition “Own Words” Definition Sentence Example Visual Representation Species Adaptations Competition Predation 3