1. SEPTEMBER 26, 2017 OBJECTIVE: Students will explore evidence for evolution in the fossil record. WARM-UP: Write the heading “Tetrapod Limbs” in your lab notebook. Answer the questions (in your basket) in your lab notebook. I have provided a print out of Tetrapod Limbs. HOMEWORK: Add 1 question to I Wonder Journal Agenda: Work fossil lab Review Comparative Anatomy (color activity) in Evidence for Evolution Packet Fish With Fingers (video and discussion questions are found on weebly)

2. Tetrapod Limbs (Warm-UP) - answer questions in lab notebook.
What are the similarities and differences among the seven limbs shown?
How would scientists explain why these very different species all have limbs with five digits?
What is the difference between a homologous structure and an analogous structure? Name some examples of each.

3. A Fish with Fingers?
What did old theories say about the evolution of land-dwelling animals, and why was paleontologist Jenny Clack dissatisfied with these explanations? (1-1:24)
What evidence did Clack find to disprove old theories? (2:28)
What explanation of the evolution of land animals can Clack give based on current fossil evidence? (3:20)

4. Homologous structures
Body parts that are similar in position, structure and EVOLUTIONARY origin, but not function. Like the tetrapod limbs we look at yesterday.

5. Analogous
Body parts that are similar in function, but NOT position, structure and EVOLUTIONARY origin