1. Warm Up 5 2/27 Match the word to the definition:
Adaptation fitness common descent
Descent with modification struggle for existence
1. each living species has descended, with changes, from other species over time
2. all species were derived from common ancestors
3. the ability of an individual to survive and reproduce
4. members of each species compete for food/necessities
5. inherited characteristic that increase an organism’s chance of survival

2. 15-3 Evidence of Evolution Notes
Fossil Record
Geographic Distribution
Body Structures
Embryos

3. 1. The Fossil Record Detailed record of evolution
Fossils- preserved remains of ancient organisms
formed in different layers of rock were evidence of gradual change 3

6. 2. Geographic Distribution
Descended w/modification from a common mainland ancestor
Similar animals in different locations

8. Geographic Distribution

9. 3. Similarities in Body Structure
Comparative anatomy- study of similarities and differences in the body of different organisms

10. Homologous structures- different mature forms but develop from the same clumps of cells
may or may not perform the same function

12. Vestigial organs- serve no useful function12

14. 4. Similarities in Early Development
shows a close relationship (vertebrate embryos all have a tail & gill slits)

15. Similarities in DNA and Proteins
Not only do scientists compare body structures, but they can also compare similar DNA and proteins

16. What are the 4 evidences of evolution?

17. The same kind of cells that grow in similar patterns in different but related organisms produce
_________________.

18. Now days, scientists can compare similar DNA and proteins.
Was Charles Darwin able to look at DNA?