Across
- 1. The type of selection that humans control.
- 5. The kind of structures that have different mature forms but develop from the same embryonic tissues.
- 8. The ability to survive and reproduce in a specific environment.
- 9. Change over time.
Down
- 1. Any inherited characteristic that increases an organism's chance of survival.
- 2. The type of descent that explains why all species are linked in a single tree of life.
- 3. The kind of organs that are so reduced in size they are just traces of homologous organs in other species.
- 4. The preserved remains of ancient organisms.
- 6. A well-supported explanation of phenomena that have occurred in the natural world.
- 7. The type of selection that increases an organism's fitness in its environment.