Opener, Wed., Nov. 16 th Watch the video, write down your observations!!

1. Opener, Wed., Nov. 16thWatch the video, write down your observations!! • http://www.arkive.org/ground-pangolin/smutsia-temminckii/video-00.html

2. 10.3 KEY CONCEPT Darwin proposed natural selection as a mechanism for evolution!!

3. 11-16-2010EOC Practice questions, p. 541 • 1-6, multiple choice

5. neck feathers crop tail feathers Darwin noticed some cool stuff!!! process by which humans select traits through breeding!

6. ability of a trait to be passed down. • struggle for survival () • Darwin proposed: adaptations arose over many generations

7. Due to overpopulation & limited resources! • Survive & Reproduce… • () Pass on traits

8. mechanism by which individuals that inherited beneficial adaptations produce more offspring (on avg) than other individuals

9. VARIATION OVERPRODUCTION ADAPTATION DESCENT withMODIFICATION • 4 main principles to the theory of natural selection. • variation Natural selection explains how evolution can occur. • overproduction • Fitness is the measure of survival ability and ability to produce more offspring. • adaptation • descent with modification

10. five digits wrist bone Natural selection acts on existing variation. • Natural selection can act only on traits that already exist. • Structures take on new functions in addition to their original function.

11. 4 Main principles of Natural Selection . . . . . . heritable differences that exist in EVERY pop are the basis for NS Having many offspring increases chance of survival, BUT also increases competition A certain variation that allows one to survive better than others it competes against Heritability of adaptations!! More will have the traits in every following generation, as long as conditions remain beneficial!!

12. Happy Monday! Today’s opener = grade your Practice EOC Remember, only 14 days until BIO EOC!! Quiz tomorrow— Ch 17, Ch 10— vocab, Ch Review and Study Guide DUE!

13. 10.4 KEY CONCEPT Evidence of common ancestry among species comes from many sources.

15. Evidence for evolution in Darwin’s time came from several sources!!! • Fossils in older layers are more primitive than those in the upper layers.

16. island species most closely resemble nearest mainland species • populations can show variation from one island to another

17. Larva Adultbarnacle Adult crab • identical larvae, different adult body forms • similar embryos, diverse organisms

18. similar embryos, diverse organisms

19. Comparative Embryology

20. Molefoot Batwing Human hand • similar in structure but different in function • evidence of a common ancestor Study of structures

21. Structural patterns also give us clues!!! http://www.livescience.com/animals/top10_vestigial_organs.html Check this out!! • remnants of organs or structures that had a function in an early ancestor. • Ex: Ostrich wings

22. Fly wing • similar function but DIFFERENT structure • Organisms NOT from a recent common ancestor. Bat wing

23. MOUSE & OWL Activity groups of 3-4 p. 315 FOLLOW the directions Answer the ?s @ the end 1 person = data recorder, others are “owls” Copy the data table from the book Natural Selection!!

24. http://www.pbs.org/cgi-registry/2wgbh/evolution/library/search.cgihttp://www.pbs.org/cgi-registry/2wgbh/evolution/library/search.cgi • Let’s watch a little more video, while you FINISH your cards for teacher appreciation week • Remember…ANY teacher past or present, that you’d like to say ‘thanks’ to or let them know how much they’ve helped you, etc. • FoJo, JIMS too if you want! 