Evolution Crossword 2

4. Book written by Charles Darwin.
6. A structure on a horse that evolved from the toes on a horse to help support the horse as the horse grew larger.
8. A structure on a horse that evolved due to change in diet from meat to grass.
12. Descent with_____________ states that each living organism has descended, with changes from other species over time.
13. ___________Structures are body parts that suggest a common ancestry and serve on apparent purpose.
14. Another name for the tail bone, which is a vestigial structure in humans
15. Evidence that humans and chimpanzees are related.
17. A vestigial structure that allows you to wiggle your ears.
18. ____________ Descent states that animals were derived from common ancestors.
19. An example of a transitional fossil.
20. Evidence for evolution that shows that chemicals are more similar in related organisms.
21. Similarity of ________ suggests a similarity between animals at initial stages of development.

1. ___________ fossils show a transition from one species or group to another.
2. An internal human organ that is a vestigial structure.
3. Evidence for evolution that shows that humans and primates are similar.
5. Evidence for evolution that shows that all forms of life are based on DNA and have a similar chemistry.
7. Example of natural selection during the Industrial Revolution.
9. ___________ Structures are body parts with similar origin, history, and structure.
10. A homologous structure that is ancestral to all vertebrates.
11. Structure shared by all vertebrates sometime during their early development.
16. Evidence of evolution that shows the sequence from simple to complex organisms.