| A | B |
|---|
| evolution | a change that occurs in a species over time |
| Man's 3 evolutionary changes | taller, less hair, smaller appendix |
| mutation | an abnormal change passed on to species--it usually dies off |
| adaptation | a change that increases an organism's chances of survival--a positive change that continues to survive |
| natural selection | the survival and reproduction of organisms best suited to their surroundings--ex. long beaked birds (flower nectar) |
| Darwin | a naturalist who studied plants and animals and came up with the theories on evolution and origins of life |
| Galapagos Islands | 1,000 miles off coast of South America--Darwin did his studies there |
| e-coli | most studied bacteria--complete life cycle in minutes |
| specialized cells | cells that perform one job only |
| paleontology | study of time using fossil remains |
| beginning of universe theories | 4.6 billion years ago; Big Bang Theory; Expanding Universe Theory; Hot Soup Theory |
| Big Bang Theory | one common source--explosion spread everything |
| Expanding Universe Theory | gas condensed |
| Hot Soup Theory | life formed in the "hot soup" of earth's atmosphere; chemicals formed living things (Stanley Miller's work) |
| photosynthetic cells | cells that make food using light--first plant |
| flagellates | cells that move to capture food--first animal cells |
| unicellular | one-celled organism |
| multicellular | organisms with many specialized cells |
| species | a group with similar characteristics that can be interbred and produce offspring |
