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| the scientific study of interactions among organisms and between organisma and their environment or things around them. |
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| contains tha combined portion of the planet in which all of life exists,icluding land,water,and air,or the atmosphere. |
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| a group of organisms so similar to one another that they can breed and produce fertile offspring. |
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| groups of individuals that belong to the same species and live in the same area. |
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| assemblages of different populations that live together in a difined area. |
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| a collection of all the organisms that live in a particular area together with their nonliving or physical environment. |
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| a group of ecosystems that have the same climate and similar dominant communities. |
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| use energy from the environment to fuel the assembly of simple inorganic compounds into complex organic molecules. |
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| organism that can capture energy from the sun or chemicals and use it to produce food from inorganic compounds. |
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| light and energy to power chemicals reactions thats convert carbon dioxide and water into oxygen and energy-rich carbohydrates such as sugar and starches. |
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| process by wich some organisms such as certain bacteria use chemical energy to produce carbohydrates. |
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| organism that obtain energy from the foods it consumes. |
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| organism that relies on other organism for its energy and food supply. |
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| obtain energy by only eating plants. |
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| snakes,dogs,and owls eat animals. |
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| eat both plants and animals. |
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| mites,earthworms,snail and crabs feed on plants and animal remains and other dead matter. |
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| a series of steps in which organisms transfer energy by eating and being eaten. |
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| links all the food chains in an ecosystem together. |
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| each step in a food wed or food chain. |
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| a diagram that shows the relative amounts of energy or matter contained within each trophic level in a food chain or food web. |
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| the total amount of living tissue within a given trophic level. |
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| chemical compounds and other forms of matter are passed from one organism to another and from one part of the biosphere to another. |
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| the process by which water changes from liquid to an atmospheric gas. |
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| water can also enter the atmosphere by evaporating from the leaves of plants. |
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| all the chemicals substances that an organism needs to sustain life. |
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| such as bacteria which live in the soil and on the roots of plants called legumes convert nitrogen gas into ammonia. |
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| other soil bacteria convert nitrates into nitrogen gas. |
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| the rate at which organic matter is created by producers. |
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| when an ecosystem is limited by a single nutrient that is scarce or cycles very slowly. |
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| when an aquatic ecosystem receives a large input of a limiting nutrient the result is often an immediate increase in the amount of algae and other producers. |
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