Darwin and the Galapagos (Part 3)

What You'll Learn

Charles Darwin observed that finches on different Galapagos Islands had different beak shapes suited to their food sources. This helped him develop the theory of natural selection.

Key Words

dominant
recessive
mutation

Materials Needed

coins (for Punnett squares)
tape
index cards

Safety First

Use materials only as directed in the experiment.
Keep small objects away from young children.
Work in a well-ventilated area when using vinegar or other strong-smelling substances.

Steps

Step 1 — Read

Read about Cells and write down three key facts.

Step 2 — Do

Model mitosis using pipe cleaners as chromosomes. Show each phase: prophase, metaphase, anaphase, and telophase.

Step 3 — Observe

Look for patterns in your observations.

Step 4 — Record

Make a graph or chart showing your results.

Check Your Understanding

Question 1

1 of 3

Who is known for the theory of natural selection?