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| Symbiotic Relationship where one organism benefits and the other is unaffected. |
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| Symbiotic relationship in which both organisms benefit. |
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| Symbiotic relationship in which one organism benefits and the other is harmed. |
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| Relationship between organisms in which at least one benefits. |
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| Belly side. Opposite of the dorsal s side. |
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| Rain with a pH below 7; causes deterioration of forests, lakes, statues, and buildings. |
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| Tropism (heat, light, and gravity) |
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| Response due to an environmental stimulus; controlled primarily by hormones. |
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| Variety of life in an area;l usually measured by how many species are in an area. |
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| Non-living factors in an environment |
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| Biotic components are the living things that shape an ecosystem. |
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| The branch of biology that deals with the relations of organisms to one another and to their physical surroundings. |
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| Used with five basic concepts, the smallest the cell. Many specialized cells make up a tissue, many tissues an organ, many organs an organ system, and finally, many organ systems an organism. |
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| The turning or bending of a plant or other organism in response to a directional source of heat. |
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| Gravitropism (or geotropism) |
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| A turning or growth movement by a plant or fungus in response to gravity. |
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| The directional growth of a plant in response to sunlight. |
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| The close external resemblance of an animal or plant (or part of one) to another. |
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| Structural adaptation that enables species to blend with their surroudings; allows a species to avoid detection by predators |
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| An organism that is able to form nutritional organic substances from simple inorganic substances such as carbon dioxide; example a plant. |
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| An organism deriving its nutritional requirements from complex organic substances. |
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| A series of organisms each dependent on the next as a source of food. |
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| A system of interlocking and interdependent food chains. |
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| A graphical representation designed to show the biomass or biomass productivity at each trophic level in a given ecosystem. |
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| A graphical representation designed to show the biomass or biomass productivity at each trophic level in a given ecosystem. |
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| a biogeochemical cycle or nutrient cycle is a pathway by which a chemical element or molecule moves through both biotic (biosphere) and abiotic (lithosphere, atmosphere, and hydrosphere) compartments of Earth. |
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| Process by which water circulates between the earth's oceans, atmosphere, and land, involving precipitation as rain and snow, drainage in streams and rivers, and return to the atmosphere by evaporation and transpiration. |
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| Process by which nitrogen and its compounds are interconverted in the environment and in living organisms, including nitrogen fixation and decomposition. |
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| Cycle of thermonuclear reactions believed to occur in stars, in which carbon nuclei are repeatedly formed and broken down in the conversion of hydrogen into helium. |
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| biogeochemical cycle that describes the movement of phosphorus through the lithosphere, hydrosphere, and biosphere. |
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| A limiting factor or limiting resource is a factor that controls a process, such as organism growth or species population, size, or distribution. |
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| Ecological succession that begins in an area where no biotic community previously existed. |
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| Succession on a site where an existing community has been disrupted. |
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| J-shaped Curves (logistic) |
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| The Exponential curve (also known as a J-curve) occurs when there is no limit to population size. |
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| S-shaped Curves (logistic) |
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| The Logistic curve (also known as an S-curve) shows the effect of a limiting factor. |
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| The number of people, other living organisms, or crops that a region can support without environmental degradation. |
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