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DARWINS THEORY.pptx
- 2. SLIDESMANIA.COM SLIDESMANIA.COM BIODIVERSITY and EVOLUTION Subtopic: Darwin’s Theory
- 3. SLIDESMANIA.COM OBJECTIVES: • Explain the theory of the natural selection process. • Explain Darwin’s contribution to the concept of evolution.
- 4. SLIDESMANIA.COM • Describe the role of genetic variation and environmental factors in the theory of evolution by natural selection. • Compare and contrast Lamarck’s and Darwin’s theories of evolution through a Venn diagram.
- 5. SLIDESMANIA.COM SLIDESMANIA.COM Review: • Who is Jean Baptiste Lamarck? • What is a theory of Acquired inheritance? • Why Lamarck's theory was disproved?
- 7. SLIDESMANIA.COM SLIDESMANIA.COM • Who do you think is in the first picture? • What do you notice in the second picture? • What do you think will be our topic today?
- 8. SLIDESMANIA.COM In your own words, explain the term evolution.
- 9. SLIDESMANIA.COM Picture Analysis Arrange the pictures according to the appropriate sequence. ACTIVITY 1:
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- 11. SLIDESMANIA.COM SLIDESMANIA.COM Guide Questions: 1. How has technology changed our lives over the last generation? 2. Based on the given examples, what are the products of technology on the year of: a. 1880s to 1930s b. 1940s to 1990s c. 2000 to the future
- 12. SLIDESMANIA.COM ACTIVITY 2: Evolving Ideas: Who Was Charles Darwin?’’ Guide Questions: 1. What are the contributions of Charles Darwin? 2. What are the 5 types of natural selection? 3. What happens in the process of natural selection? 4. How does the environment influence natural selection?
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- 14. SLIDESMANIA.COM SLIDESMANIA.COM Charles Darwin is often cited as the greatest biologist in history. His most famous work, On the Origin of Species, explains the theory of evolution by natural selection, providing numerous supporting examples in relation to the evolutionary concepts.
- 15. SLIDESMANIA.COM SLIDESMANIA.COM 5 Types of Natural Selection • Directional selection • Stabilizing selection • Disruptive or diversifying selection • Kin selection • Sexual selection
- 16. SLIDESMANIA.COM SLIDESMANIA.COM Natural selection process is a process where organisms that are better adapted to an environment will survive and reproduce. This means that the advantageous alleles of this variant organism are passed on to offspring. Over many generations, the process of natural selection leads to evolution occurring.
- 17. SLIDESMANIA.COM SLIDESMANIA.COM Natural selection acts on the phenotype and the phenotype is the result of the interaction between genotype and environment.
- 18. SLIDESMANIA.COM SLIDESMANIA.COM APPLICATION: As a student, why do you think it is important to study the concept of evolution to understand the organisms living on Earth in today's generation?
- 19. SLIDESMANIA.COM SLIDESMANIA.COM Directions: Use the Venn diagram below to show the similarities and differences between Lamarck’s and Darwin’s theories of evolution. Choose your answer from the box.
- 20. SLIDESMANIA.COM SLIDESMANIA.COM Organism change to adapt to the environment. Traits are shown when they are used. Variations within species. Species who will fail to pass on their traits will become extinct. There was an increasing complexity with in all organisms. Parents can pass on these acquired traits to their offspring. There was no such thing as extinction. Only those that are fittest will pass their traits. Inheritance of parents’ genes.
- 23. SLIDESMANIA.COM SLIDESMANIA.COM BIODIVERSITY and EVOLUTION Adaptation and Survival of Species
- 24. SLIDESMANIA.COM � • Define behavioral, structural, and physiological adaptation. � • Explain how species diversity increases the probability of adaptation. � • Determine how plants and animals adapt to their environment. OBJECTIVES:
- 25. SLIDESMANIA.COM � What are the different theories of evolution? � How do Lamarck’s and Darwin’s theories differ? REVIEW:
- 32. SLIDESMANIA.COM SLIDESMANIA.COM What living organisms can you find in each ecosystem?
- 33. SLIDESMANIA.COM SLIDESMANIA.COM How do you think these organisms survive in the given ecosystem?
- 34. SLIDESMANIA.COM Activity 1 Analyze the picture below and answer the questions that follow.
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- 42. SLIDESMANIA.COM SLIDESMANIA.COM Guide Questions: • What would be the effect of the occurrence of natural calamities in the ecosystem?
- 43. SLIDESMANIA.COM SLIDESMANIA.COM How do you think these plants and animals will survive when there are changes in climate or natural calamities?
- 44. SLIDESMANIA.COM “I Belong” Read and analyze the mode of adaptation of animals indicated in the flashcards. Activity 2
- 46. SLIDESMANIA.COM Guide Questions: 1. Based on the activity, how do you define behavioral, structural, and physiological adaptation? 2. How do plants and animals adapt to their environment? 3. How does species diversity increase the probability of adaptation?
- 47. SLIDESMANIA.COM • Behavioral adaptation is the attitude or action that the organisms do to survive. • Structural adaptation involves physical characteristics. • On the other hand, physiological adaptation happens inside the body of organisms if the environment is changed or they are triggered.
- 48. SLIDESMANIA.COM Plants and animals adapt to their environment through the modifications in their behavior, physical characteristics and body functions.
- 49. SLIDESMANIA.COM Species diversity increases the probability of adaptation because each type of species has its unique form of coping with changes in the environment.
- 50. SLIDESMANIA.COM Application How does adaptation affect your everyday life?
- 51. SLIDESMANIA.COM survival behavioral adjust structural protect physiological preservation diversity adaptation Making Generalization Directions: Complete the paragraph by filling in the blanks with the correct word from the box.
- 52. SLIDESMANIA.COM Adaptation is the ability of an organism to ________ and thrives in a given environment. Plants and animals adapt to their environment for_________.There are three types of adaptations:_________,__________and________ _adaptations. Adaptation is important to organisms to _________ them from harm, look for their food, and for the ___________ of their species. Species __________ increases the probability of ___________.
- 53. SLIDESMANIA.COM Assessment Identify the adaptation characteristics of the following organisms. Match column A with Column B. A B 1. Duck 2. Roses 3. Camel 4. Pig 5. Oregano a) Hump back b) Snout c) Strong odor d) Thorny branches e) Colorful f) Webbed foot