Change Over Time

1. The body part of horse relatives that seems to have changed over time.
2. The number of ways plant and animal cells are different.
5. Synonyms for strata.
7. Population of organisms that we actually watch change in terms of color variety in response to their environment and predators.
8. The homology that every form of life has. It may link everything!!
9. Naturalist/Scientist that developed the theory of evolution.
10. A feature that an organism inherited from an ancestor but is no longer used.
16. evidence Used to show that life is old and has changed over time.
17. Humans selecting traits in organisms like dogs and food crops.
18. genetic characteristics

1. Baleen whales may have once had these as adults. Now only the fetus has them and then they disappear.
2. Fossils or organisms that show the intermediate between today's creatures and their old relatives
3. Nature selecting traits by "survival of the fittest".
4. Using radioactive decay (change) in atoms to give an exact date to something.
6. Things shared by organisms we think are closely related.
11. A group of the same type of organism that can breed and produce offspring.
12. An example of a vestigial feature in dogs. We think that they were once actually used as toes.
13. Similar characteristics in new and old species due to relatedness.
14. Difference in a species important to survival of the species so when the environment changes, some can still survive.
15. Figuring out age of rock and fossils by position in rock strata.