Theories_of_Evolution. Life science Earth

Earth $ life science

1. Theories of Evolution Casasawan A.

2. Theories of Evolution 1. Theories of Baptist de Lamarck 2. Theory of Charles Darwin

3. Jean Baptiste De Lamarck A French naturalist who first proposed that organism change overtime. Theory of Need Theory of Use and Disuse Theory of Inherited Acquired characteristics

4. Theory of Need Organism NEEDS to adapt in order to survive. A response to its environment. Development of body parts

5. Theory of Use and Disuse Used will be develop Not used will be lost or disappear.

6. Theory of Inherited Acquired Characteristics The develop or lost characteristics will be pass to the next generation.

7. Theory of Inherited Acquired Characteristics The develop or lost characteristics will be pass to the next generation.

8. Lamarck pattern of Evolution 1. Theory of Need 2. Theory of Use and Disused 3. Theory of Inherited Acquired Characteristics

9. Charles Darwin An English naturalist, geologist, and naturalist who proposed that evolution is a result of natural selection. Survival of the fittest Better adapt in environment = more chance of survival. (continuation of generation)

10. In 1859

11. Compare and Contrast

12. Mechanism of Evolution 1. Non-Random Mating 2. Mutation 3. Genetic Drifting 4. Gene flow 5. Natural Selection

13. Non-Random Mating Not by chance. Criteria are physical trait or characteristics. Inbreeding as an example. Common in dogs, pigs, cats, chicken, and other animals.

14. Mutation Change in Chromosome or gene. Change of appearance Caused by mutagens The gene pool becomes different from the original.

15. Genetic drift A change of gene pool Death of a certain trait due to natural disasters. Fitness is not the issue for survival.

16. Genetic drift

17. Gene flow Migration or simply not Increases the variation (phenotypes) Interbreeds with newly found population.

18. Gene flow

19. Natural Selection Nature will select Survival of the fittest Offspring will carry these favorable traits which will be different from their old version.

20. Mechanism of Evolution 1. Non-Random Mating 2. Mutation 3. Genetic Drifting 4. Gene flow 5. Natural Selection

21. Speciation Formation of new species Result from evolution Numerous alteration in gene pool Requires time Only in same species

22. Speciation

23. Speciation There are four types of speciation: 1. Allopatric 2. Peripatric 3. Parapatric 4. Sympatric

24. Speciation

25. Speciation

26. Speciation

27. Speciation

28. Speciation

29. Speciation

30. Speciation

31. Speciation

32. Speciation

33. Speciation

34. Lets Review 1. What are the three theories of Lamarck? Theory of Need Theory of Use and Disuse Theory of Inherited acquired Characteristics 2. How natural selection works? Survival of the fittest 3. What are the mechanism of evolution? Non-Random Mating, Mutation, Genetic Drifting, Gene flow, Natural Selection

35. A

36. B

37. c

38. B

39. C

40. B

41. D

42. A

43. A

44. B