Science Today

Science Today

SCIENCE TODAY 1. TAKE VOCAB QUIZ! Number a sheet of paper 2. 3. 4. 5. 1-25 COMPLETE YOUR BLUE GRAPHS FROM THE LAB YESTERDAY AS WELL AS THE LAB QUESTIONS. ANSWER IN COMPLETE SENTENCES- you can use the back of your graph. Hand in any Chapter 7 worksheets or vocabulary that needs to be checked off. I will also display the Ch. 7 answers so you can check your worksheets. GET GREEN CHAPTER 8 PACKET TO COMPLETE THIS WEEKEND. Chapter 7.1 1. differences 2. B 3. C 4. species

5. population 6. species 7. change 8. characteristics 9. New species form. 10. evolution 11. A 12. D 13. A dead organism is covered by a layer of sediment. Over time, the organism is completely covered. Minerals in the sediment may gradually replace the organism with stone or the organism may leave an imprint on the surrounding rock. 14. the fossil record 15. by the fossils ages and physical similarities 16. organisms 17. less likely 18. exist 19. B 20. A 21. hypotheses 22. by a branch 23. Answers may vary and may include any two of these: camels, llamas, pigs, peccaries, hoofed grazing animals, and hippopotamuses. 24. ancestors 25. tree of life 26. that their knowledge is not complete 27. by examining living organisms 28. Whales breathe air, give birth to live young, and produce milk. 29. tiny hip bones 30. B 31. B 32. D 33. C 34. A

Ch. 7.2 1. Scientists learned that Earth is much older than previously thought, gradual processes have changed Earths surface, and that Earth had a fossil record. 2. A 3. B 4. Galpagos Islands 5. Their beaks were different. 6. obtaining food 7. D 8. C 9. The finches were descended from South American finches blown to the islands by a storm. Over many generations, the finches adapted to life on the island. 10. He spent several years analyzing evidence and gathering other peoples ideas. 11. C 12. A 13. B 14. to produce plants and animals with desired traits 15. to produce stronger or quicker horses 16. to produce larger fruit 17. offspring 18. competition 19. survive 20. evolve

21. that the Earth was old enough to allow for slow changes 22. On the Origin of Species by Means of Natural Selection 23. natural selection 24. C 25. A 26. B 27. D 28. how organisms inherit traits, or why organisms show so much variation 29. genes 30. offspring 31. selection Ch. 7.3 1. A 2. B 3. C 4. C 5. Because people hunt elephants for their tusks and tuskless elephants are not hunted, tuskless elephants are more likely to survive to reproduce. 6. A few insects in the population are resistant to the chemical. 7. generation time 8. generation time 9. colorful 10. because colorful males are more likely to pass on their genes to the next generation 11. D 12. A 13. B 14. C 15. separation 16. traits 17. adaptations 18. species

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