1. Why is it scientifically unsound to form a theory that cannot be disproven?

2. Wisdom teeth are often given as an example of a vestigial trait. Why?

3. The human embryo goes through a stage where it has gills and a tail, similar to a fish. Where do the gills go as the embryo develops?

4. Do we think archaeopteryx could fly? Find out what arguments support the pro and con sides and report them here.

5. We believe that modern birds evolved from feathered dinosaurs. If we find the fossil of a feathered dinosaur in a higher strata than the fossil of a bird, does this invalidate the idea that this evolution occurred? Explain fully.

Use complete sentences to define the following terms or phrases in your own words. (Not all the terms are in the lesson. Using a dictionary or outside site for help is fine, and sometimes necessary, but be sure to use your own words and cite your source!)

6. Vestigial Trait (include an example)

7. Homologous (include an example)

8. Analogous (include an example)

9. Guided evolution

10. Ontogeny