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MDC- KT 4&5
Midterm Study Guide
| Term | Definition |
|---|---|
| adaptation | a behavior or trait that increases a species chance of survival in a specific environment |
| gills | a respiratory organ that enables aquatic animals to take oxygen from water and to excrete carbon dioxide |
| fins | a wing- or paddle-like part of a fish used for propelling, steering, or balancing in the water |
| swim bladders | an air-filled sac near the spinal column in many fishes that helps maintain buoyancy |
| scales | any of the small, stiff, flat plates that form the outer body covering of most fish |
| lateral line | an organ running lengthwise down the sides of fish, used for detecting vibrations and pressure changes |
| streambed | the bottom of the stream channel |
| predators | an animal that lives by capturing and eating other animals |
| prey | an animal that is eaten by a predator |
| population | group of individuals of the same species occupying a specific area |
| plankton | microscopic free-floating plant or animal like organisms |
| community | a group of plants and animals living and interacting with one another in a particular place |
| habitat | the natural environment in which an organism normally lives, including the surrounding and other physical conditions needed to sustain it |
| niche | teh function, position or role of a species within an ecosystem |
| biotic | of or having to do with life or living organisms; organic |
| abiotic | nonliving; not derived from living organisms; inorganic |
| carrying capacity | an ecosystem's resource limit; the maximum number of individuals in a population that an ecosystem can support |
| producers | an organism that is able to produce its own food from non-living materials, and which serves as a food source for other organisms in a food chain |
| consumers | an organism that feeds on other organisms in a food chain |
| decomposers | an organism such as bacterium or fungus that feeds on and breaks down dead plant or animal matter |
| food chain | a series of plants and animals linked by their feeding relationships and showing the transfer of food energy from one organism to another |
| food webs | many interconnected food chains within an ecological community |
| energy pyramid | a graphical representation designed to show the relationship between energy and trophic levels of a given ecosystem |
| trophic level | a group of organism that occupy the same position in a food chain |
| natural selection | the natural process in which those organisms best adapted to the conditions under which they live survive and poorly adapted forms are eliminated |
| invasive species | a species that has been introduced by human action to a location where id did not previously occur naturally |
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bluevolt85
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