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study guide
| Question | Answer |
|---|---|
| levels of organization largest to smallest | biome ecosystem populations species |
| methods ecologists use | observing experimenting modeling |
| what type of organism would be at the beginning of a food chain | algae |
| what organism uses energy to make its own food | autotrophs |
| what is the total amount of living tissue within a given trophic level | 10% |
| what animals eat both producers and consumers | mice larger fish and hawks |
| a snake that eats a frog that has eaten an insect that fed on a plant | ecological pyramid |
| what are the 3 types of pyramid & define | energy pyramid biomass pyramid and pyramind of numbers |
| what is the process by which bacteria converts nitrogen gas air to amonia | nitrogen fixation |