1 / 13

REVIEW FOR QUIZ TO ADD POINTS TO EVOLUTION GRADE

REVIEW FOR QUIZ TO ADD POINTS TO EVOLUTION GRADE. SCI.9-12.B-5.1 - [Indicator] - Summarize the process of natural selection. *Darwin’s 5 points. Population has variations. Some variations are favorable. More offspring are produced than survive Those that survive have favorable traits.

hayley
Download Presentation

REVIEW FOR QUIZ TO ADD POINTS TO EVOLUTION GRADE

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. REVIEW FOR QUIZ TO ADD POINTS TO EVOLUTION GRADE

  2. \SCI.9-12.B-5.1 - [Indicator] - Summarize the process of natural selection.

  3. *Darwin’s 5 points • Population has variations. • Some variations are favorable. • More offspring are produced than survive • Those that survive have favorable traits. • A population will change over time.

  4. *Evidence of Evolution 1. Biogeography: Geographical distribution of species. EX. Most marsupials live in Australia. 2. Fossil Record: Fossils and the order in which they appear in layers of sedimentary rock tells us the order that they appeared on earth (strongest evidence).

  5. *Evidence of Evolution 3. Taxonomy: Classification of life forms. 4. Anatomy: • Structures that are similar because of common ancestry (comparative anatomy) • Vestigial structures (remnant or leftover) structures that now have no function (human appendix)

  6. Homologous Structures

  7. SCI.9-12.B-5.5 - [Indicator] - Exemplify scientific evidence in the fields of anatomy, embryology, biochemistry, and paleontology that underlies the theory of biological evolution.

  8. *Evidence of Evolution 5. Comparative embryology: During the early development of organisms very similar structures appear in different organisms. Ex. At one point, humans have gill slits and webbed fingers. 6. Molecular biology: DNA and proteins (amino acids) cow insulin was once used to treat humans with diabetics

  9. Evidence for Evolution - Comparative Embryology Similarities In Embryonic Development

  10. Number of Individuals Small Large Size of individuals Modes of Action • Natural selection has three modes of action: 1. Stabilizing selection 2. Directional selection 3. Diversifying selection

  11. Number of Individuals Small Large Size of individuals 1. Stabilizing Selection • Acts upon extremes and favors the intermediate.

  12. Number of Individuals Small Large Size of individuals 2. Directional Selection • Favors variants of one extreme.

  13. Number of Individuals Small Large Size of individuals 3. Diversifying Selection • Favors variants of opposite extremes.

More Related