1. What do these forelimbs illustrate?

2. Homologous Structures

3. Analogous Structures may have similar appearance and function, but are not derived from a common ancestor

4. Analogous structures DO NOT indicate common ancestry.

5. Similarities in DNA or protein sequences are called:

6. Molecular Homologies

7. The study of the geographic distribution of organisms is called:
In 1915 the German geologist Alfred Wegener was struck by the fact that identical fossil plants and animals had been discovered on opposite sides of the Atlantic. Since the ocean was too far for them to have traversed on their own, Wegener proposed that the continents had once been connected.

8. Biogeography

9. The appendix is an example of…
A comparison of the appendix in a rabbit (left), fetal human (middle) and adult human (right).

10. Vestigial structures

11. This picture illustrates….

12. Homologous structures

13. Homologous or Analogous?
4-chambered
heart
3-chambered
heart
4-chambered
heart

14. Homologous or Analogous?

15. Analogous (the common ancestor did not have wings)

16. Homologous or Analogous?

17. Homologous
Each leaf has a very different shape and function, yet all are homologous structures, derived from a common ancestral form.

18. What kind of structures?

19. Vestigial

20. Who warned that human overpopulation would lead to a struggle for resources, disease, and starvation?

21. Thomas Malthus

22. Term that is a measure of an individual’s survival and reproductive success.

23. Fitness

24. Lamark’s Principle of ________ states that changes that occur to an individual in its lifetime can be passed on to offspring.

25. Acquired Traits

26. A dairy farmer uses ____________ when he chooses to breed the cows that produce the most milk.

27. Artificial Selection