PPT - Homologous vs. Analogous structure

This is a powerpoint presentation elabout the homologous structure and analogous structure.

1. EVOLUTIONARY RELATIONSHIP: HOMOLOGOUS AND ANALOGOUS Earth and life science Quarter 2 By: mrs. karen Mariel r. sable

2. REVIEW: PICTURE WORDING INSTRUCTION: Connect the name of the pictures to create word/s that is related from the previous lesson.

3. Jenny tick engine earring Genetic engineering

4. - ing

5. Jeans Clone Gene Cloning - ing

6. Gel Electro pour raisin Gel Electrophoresis

7. rest trick Shawn in jam Restriction Enzyme

8. OBJECTIVES At the end of the lesson, the learner should be able to: Examine various body parts of organisms to provide evidence of evolutionary relationships of various organisms linked to their common ancestor. Describe the analogous and homologous structure of the organisms. Recognize the evidence of evolutionary relationship between various organisms of common ancestor.

9. EVOLUTIONARY RELATIONSHIP: HOMOLOGOUS AND ANALOGOUS Earth and life science Quarter 2 By: mrs. karen Mariel r. sable

10. Do you believe that humans came from apes? Why do some people think that humans evolve from apes?

11. ACTIVITY: HOMOLOGOUS VS. ANALOGOUS OBJECTIVE Describe how the present system of classification of organisms is based on evolutionary relationships through homologous and analogous structures of various organisms. MATERIALS Pen and paper

12. ACTIVITY: HOMOLOGOUS VS. ANALOGOUS PROCEDURE Study the different body parts in the picture below which shows homologous and analogous structures. Observe the structures of the body parts and their functions to each animal. Then, write your observation in the table given. Describe the difference between homologous structure and analogous structure based on your observations.

13. Reminders: Write your answers on the cartolina provided. The activity must be done in 15 minutes. After your group is done, shout your yell. When everyone is finished, present your work in front.

14. Let’s expound our learning! Are humans and apes homologous or analogous? Why? Why is the human believe to have evolved from apes? How is homologous structure different from analogous structure?

15. Summary ANALOGOUS STRUCTURE means unrelated animals have organs with similar functions, yet are very different in structure and form. HOMOLOGOUS STRUCTURE are animals that have somewhat similar form and structure but have different functions.

16. Summary When an organism shares a trait due to common ancestry, it is called a homologous trait. Ex. Whales and humans An analogous trait happens when unrelated organisms (no common ancestry) have adapted to similar environmental pressure which resulted to evolution of traits. Ex. Bats and butterfly

17. Activity 2 Direction: Look into the internet some examples of organisms with homologous and analogous structure. Draw it on a bond paper and share to the class what species you have discovered that have homologous and analogous structure. This activity will be graded according to the given rubrics:

18. Activity 2 This activity will be graded according to the given rubrics:   6 8 10 Presentation Only plain reading was done Relied on the notes but discussed briefly Sharing is done more articulately Creativity There is no artistic effort done in the drawing. There is plain coloring with low level of artistry. Great effort can be seen such as coloring, sketching and other art forms.

19. Assessment Direction: On ½ crosswise, answer the following questions in sentence form with a minimum of one sentence per question. Q1. Based on the activity, what is a homologous structure? Q2. Based on the activity, what is an analogous structure? Q3. What is the difference between the homologous structure and analogous structure? Q4. Why does various organisms have similar structures in their body but differ in function (homologous?)? Q5. Why does some organisms have different structures in their body but have similar function (analogous)?

20. Thank you for listening!