Evidence for evolution

Evidence for Evolution (pg 4)

Evidence for Evolution (pg 4)

1. Fossil record: Fossils show evolutionary changes and intermediate forms

2. Comparative Anatomy: Species that are closely related share homologous structures

2. Comparative Anatomy: Species that are closely related share homologous structures

• Example: The forelimbs of mammals all share the same basic bone structure

2. Comparative Anatomy: Species that are closely related share homologous structures

• Example: The forelimbs of mammals all share the same basic bone structure

2. Comparative Anatomy: Species that are closely related share homologous structures

• Example: The forelimbs of mammals all share the same basic bone structure

Worksheet

3. Vestigial structures = body structures that have lost their primary function

3. Vestigial structures = body structures that have lost their primary function

Example: Hind limbs in whales and snakes

3. Vestigial structures = body structures that have lost their primary function

Example: Hind limbs in whales and snakesHuman Examples: Appendix, Tailbone, Goose

bumps

Diagram (pg 5)

4. Comparative Embryology: In early stages, all animal embryos look alike, suggesting common ancestry

4. Comparative Embryology: In early stages, all animal embryos look alike, suggesting common ancestryExample: Young human embryos have gill slits and a tail