The Process of Evolution Genetic changes occurring in populations can result in new species, the extinction of species, and organisms suited for different environments.

Natural Selection Charles Darwin developed a theory of how organisms with the same ancestors can look and behave differently over time.

Vocabulary evolution naturalist adaptation natural selection

Charles Darwin naturalist: one who studies plants, animals, rocks traveled to South America, Galapagos islands 5 years HMS Beagle amazed by diversity

Darwin’s observations Tortoises Finches Iguanas

Darwin’s observations

Selective Breeding When a plant or animal is bred by humans in order to get selected desirable traits. Speed in race horses Sheep with fine wool Cow with most milk Largest fruit

Adaptation: a trait that helps an organism survive and reproduce in its environment. Evolution: The gradual change in a species over time.

Natural Selection Individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species.

Natural Selection

The process of evolution power point

Natural Selection Made Easy