Common Ancestry

6. __________ homologies show structural commonalities found in embryos are found in all chordates.
9. He used evidence of past life on Earth to develop new, challenging, scientific ideas.
10. Though the fossil record provides evidence to support the theory of __________ ancestry
11. He believed that organisms evolved into different forms, but did not necessarily become extinct. He believed that changes in the environment led to an organism's use or disuse of a structure, causing an organism to change.
12. Fossil form in ________ rock
14. After many months of observation he came to the conclusion that different species are found in different locations.
15. ____________ homologies show
17. What caused these continents to move in the first place? Scientists studying Earth came up with the theory of plate __________.

1. The study of __________ allows scientists to determine how the distribution of plants and animals has changed based on
2. many pieces of evidence support the theory that birds and dinosaurs are related. One such piece of evidences called _______ record.
3. or anatomical traits that are similar, which is another piece of evidence that suggests biological evolution and common ancestry.
4. is the relatedness or similarities in traits between organisms that suggest common ancestry.
5. in Earth’s geography
7. is the one large landmass that broke apart to form continents.
8. breaking apart and movement of continents from one massive landform is called ________ drift.
13. He is known for developing a classification system that organizes organisms based on various characteristics.
16. the process of inherited, genetic changes over several generations in a population is ___________ evolution.