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Evolution
Science 7
| Question | Answer | Example |
|---|---|---|
| Darwin | naturalist who observed plants and animals and recorded the differences leading to Theory of Evolution | Sailed on the HMS Beagle |
| evolution | a species will gradually change over many generations and become better adapted to the new conditions | |
| adaptation | a trait that helps an organism to survive and reproduce | Different bird beaks |
| Natural Selection | individuals who are better adapted to their environment are more likely to survive and reproduce then the other members of the same species; over time, helpful variations gradually accumulate in a species, unfavorable variations disappear | long necks on giraffes |
| overproduction | most species produce far more offspring than can possibly survive` | fish lay millions of eggs; not all survive |
| competition | since food and resources are limited, offspring must compete to survive | |
| Survival of the Fittest | Those organisms best adapted to the environment will survive and reproduce; the "strongest" survive | |
| variation | a difference between individuals of the same species | white and brown fur in rabbits |
| fossil | the preserved remains or traces of an organism that lived in the past | |
| homologous structure | similar structures that related species inherited from a common ancestor | whales, birds, and dogs have common bone structures |
| branching tree | a diagram that shows how scientists think different groups of organisms are related | |
| species | a group of similar organisms that can mate with each other and produce offspring | dog, cat, human |
Created by:
mbuckley
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