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| An interaction between two species in which one species, the predator, feeds on the other species, the prey |
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| A relationship between two species in which one species, the parasite, benefits from the other species, the host, which is harmed |
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| interspecific competition |
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| A type of interaction in which two or more species use the same limited resource |
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| A relationship in which two different organisms live in close association with each other |
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| A relationship between two species in which both species benefit |
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| A relationship between two organisms in which one organism benefits and the other is unaffected |
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| The number of different species in an area or community |
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| A pattern in which the number of species in an area increases as the area increases |
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| A relative abundance of each species |
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| The tendency of a community to maintain consistent conditions |
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| Events that change communities or remove or destroy organisms |
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| A gradual process of change and replacement in a community |
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| Succession that begins in an area that previously did not support life |
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| The process by which one community replaces another community that has been partially or totally destroyed |
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| A species that colonizes an uninhabited area and that starts an ecological cycle in which many other species become established |
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| A final, stable community in equilibrium with the environment |
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| The movement of a substance across a cell membrane without expenditure of energy by the cell |
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the movement of particles from regions of the higher density to region of lower density. |
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| a differencein the concentration of a substance across a distance |
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| in biology, stage that exist when the concentration of a subtance is the same throughout a space. |
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| the diffusion of water or another solvent from a more dilute solution (of a solute) to a more concentrated solution (of the solute) through a membrane that is permanente to the solvent. |
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| describes a solution whose solute concentration is lower than the solute concentration inside a cell. |
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| describes a solution whose solute concentration is higher than the solute concentration inside a cell, |
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| describes a solution whose solute concentration is equal to the solute concentration inside a cell |
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| in protists, an organelle that accumulates water and then release it periodically to maintain osmotic pressure. |
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| the pressure that is exerted on the inside of cell walls and that is caused by the movement of water intro the cell |
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| the contration or shrinking of the cell membrane of a plant cell in a hypertonic solution in response to the loss of water by osmosis |
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| the second generation of substances through a cell membrane along a concentration gradient with the aid of carrier proteins |
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| a protein that transports substances across a cell membrane. |
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| a complex of protein molecules in a cell menbrane that form a pore through which ions can pass. |
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| the movement of chemical sudtances, usually across the cell membrane, against a concentration gradient; requires cells to use energy. |
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| a carrier protein that uses ATP to actively transport sodium ions out of a cell and potassium ions intro the cell. |
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| the process by which a cell membrane surrounds a particle and enclose the particles in a vesicle to bring the particle in a vesicle to bring the particle intro cell. |
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| a small cavity or sac that contains materials in eukaryotic cell; forms when part of the cell membrane surrounds the materials to be taken into the cell or transported within the cell. |
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| a method of active transport across the cell membrane in which the cell takes in extrancellular fluids. |
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| the process by which a cell engulfs large particles or whole cells, either as a defense mechanism or as a means to obtain food. |
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| a cell that ingest and destroys (digest) foreign matter or microorganiams. |
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| the process by which a substance is released from the cell through a vesicle that transport the substance to the cell surface and then fuses with the membrane to let the substance out. |
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