Download 1. adaptation: variation that makes an organism better suited to its

IDEAS ABOUT EVOLUTION
1. adaptation: variation that makes an organism better suited to its environment.
EX: beak shape, camouflage, neck length.
2. evolution: change in inherited characteristics over time
EX: size of horses, size of eyes
3. geographic isolation: population isolated due to geography - becomes new species.
EX: Galapagos Islands
4. gradualism: slow evolution
EX: raccoons, red pandas
5. mutation: permanent change in the gene of a cell
EX: Down’s Syndrome, albinos, Sickle-Cell Disease
6. natural selection: organisms best-suited for their environment are more likely to
reproduce
EX: beak shape, tooth structure,
7. population: all of an individuals of a species living in the same area
EX: number of people, poison ivy plants, deer, bees
IDEAS ABOUT EVOLUTION
8. punctuated equilibrium: rapid evolution
EX: bacteria
9. species: organism that reproduce and produce fertile offspring
EX: gorillas, mice, pigs, horses
10. variation: inherited trait that makes an individual different
EX: hair color, body shape, body size, eyes
11. Lamarck: organisms inherit acquired characteristics - NONE
12. Darwin: organisms with traits best-suited for their environment are more likely to
survive and reproduce - ALL LIVING ORGANISMS
CLUES ABOUT EVOLUTION
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ESTIMATE
EVOLUTION
DNA
HOMOLOGOUS
VESTIGIAL
SEDIMENTARY
RELATIVE DATING, RADIOMETRIC DATING
Not everything becomes a fossil.
IDEAS ABOUT EVOLUTION
9. Homologous & vestigial structures, DNA, embryology
10. No, because you can never know the original amount of radioactive material.
EVOLUTION OF PRIMATES
1. OPPOSABLE THUMB - grab or hold objects
2. BINOCULAR VISION - judge depth (focus on an object)
3. FLEXIBLE SHOULDERS - swing from branches or do the backstroke
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Hominids walk upright and have larger brains.
Homo habilis had a bigger brain and used simple tools.
They were Homo sapiens, lived in family groups and they made and used stone tools.
Living in family groups, caring for the elderly, burying the dead, artistic expression
(painting and carving)
IDEAS ABOUT EVOLUTION