1. Unit 5 – Lecture 3

2. Types of Evolution Macroevolution change of one kind of organism into another macro = large this has not been observed, but is assumed in the current evolutionary theory

3. Types of Evolution – contd Microevolution small changes in organisms through selection micro = small has been observed is assumed in in current evolutionary theory to accumulate until a large change is seen

4. Discuss Explain the difference between macro- and micro- evolution

5. Selection Example to be used: A colony of clams lives at a particular beach. These clams come in three varieties – white, grey, and black. Grey is, of course, an intermediate color between the two extremes, white and black. These clams are a part of a sea-birds natural diet – however, they are unable to see the clams well which blend into the background of the sand and rock underneath. The beach contains areas of light, dark and intermediate sand in various amounts.

6. Natural Selection Natural Selection – organisms which have the best-suited traits survive in their environment

7. Natural Selection – contd Natural Selection – organisms which have the best- suited traits survive Four types: directional selection one extreme of a trait is best and is selected

8. Natural Selection – contd Natural Selection – organisms which have the best- suited traits survive Four types: disruptive selection multiple extremes of a trait are best and are selected

9. Natural Selection – contd Natural Selection – organisms which have the best- suited traits survive Four types: stabilizing selection intermediate/average form of trait is selected

10. Natural Selection – contd Natural Selection – organisms which have the best- suited traits survive Four types: sexual selection presence of a trait influences mating trait can be physical OR behavioral La la la la la la la la laaaaaa!!!!!! I made these just for YOU!

11. Discuss Name and describe the four types of natural selection. Give an example of each type of selection [NOT my example – pick another]

12. Artificial Selection Artificial Selection – humans select desirable traits and breed out non-desirable traits crop farming

13. Artificial Selection – contd Artificial Selection – humans select desirable traits and breed out non-desirable traits animal breeding

14. Discuss What is the difference between natural and artificial selection?

15. Selection – contd Selection works on POPULATIONS not on individuals we do not select the best corn plant just to plant one seed and make one plant!! just so, one animal with new characteristics must cause change to the entire population for it to make a difference

16. Homework Complete the Darwins Five points worksheet title of worksheet = Natural Selection Label your MATERIALS check list with 2/8 material = 3 Tabs Take our your transcript, I will call you up in a minute.