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

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

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

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

Geographic Distribution

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

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

Vestigial organs- serve no useful function 12

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

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

What are the 4 evidences of evolution?

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

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