Evolution

2. the branch of science that studies the development of organisms in their prenatal form.
8. the study of _____ allows scientists to determine how the distribution of plants and animal have changed based on changes in Earth's geography
11. this structure is something that is similar in position, structure, or evolutionary origin
13. these homologies are similar anatomical structures that exist between species and can be identified as a link to a common ancestor
14. well-supported descriptions
15. animals that are mostly vertebrates but include some related invertebrates.
16. relates to how long it takes for certain radioactive materials to decay
17. includes the total number of fossils, as well as their locations in rock formations and sedimentary layers
18. these homologies are observed by studying similarities in how embryos form between different organisms

1. the presence of this is to counter the powerful forces encountered during chewing and biting
3. a class of organisms that all share certain traits like breathing air, having hair or fur, and producing milk for their young
4. theory with limited information or research
5. these homologies show how molecules are similar in species that are closely related.
6. the presence of this crest along the midline on the top of the skull indicates that that organism has exceptionally strong jaw muscles
7. well tested hypothesis
9. this family includes humans and the great apes
10. allow humans to better exploit available food sources
12. organelle that generates energy