Do now activity #1 Define Common Ancestor in your own words. At least how many years does it take for an evolution to take place? True or False: Animals are fit when they are the strongest on the planet. If the #3 is False, re-write it to make it a True statement.

Do now activity #2 Name all types of evidence that support evolution. According to natural selection, how do species evolve? True or False: There are five types of evolutionary evidence. If the #3 is False, re-write it to make it a True statement.

Section 6-2: evidence of evolution Essential Question: How does the evidence of evolution support the theory that all organisms evolved from a common ancestor? Learning Target Provide evidence from several sources that all organisms have evolved from a common ancestor. Explain the four factors that result in the evolution of a species. Section 6-2: evidence of evolution

announcements Biology Tutoring this week: Lunch B (Tuesday & Thursday) 7:00AM (Monday – Friday) After school Biology Tutoring: Tuesday Syllabus must be turned in by today Lab tomorrow, no make ups!

announcements Available Extra Credit: Tissue Box = 2 Points 6.6oz bag of Goldfish (Pretzel/Cheddar) = 5 Points

Don’t forget to chunk your notes!

There are 5 sources of evidence to support the theory of evolution. overview

The 5 types of Evidence for Evolution are: overview The 5 types of Evidence for Evolution are: Fossils Geography Development Homologous structures DNA

1. Fossil record Fossils are preserved remains of ancient ________ that provide a ______ of how organisms have evolved. Organisms/record

1. Fossil record Fossils are preserved remains of ancient organisms that provide a record of how organisms have evolved.

1. Fossil record Living things change over time Fossils help prove that: Living things change over time Earth is many millions years old

2. geography Animals on different continents have similar adaptations… BUT …come from different ______ . ancestors

2. geography Similar __________ happen when there are similar: Environments Natural selection situations adaptations

3. Developmental similarities Similarities in Early Development Embryo cells of all vertebrates develop: in the same order in similar patterns to produce tissues and organs How do these cells develop? Mitosis!

4. Homologous structures Similarities between arms, wings, legs, and flippers same basic bones different functions develop from the same embryonic tissues

4. Homologous structures Vestigial Organs: Structures that have no function They have no affect on an organism’s survival

4. Homologous structures Example: Your appendix Tonsils Wisdom teeth Hip bone in whales

This is new! Now we can compare the DNA of different organisms to see how closely or distantly related they are. 5. DNA