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25 Cards in this Set
- Front
- Back
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Biosphere
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portion of earth that supports life; extends from high in the atmosphere to the bottom of the oceans
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Ecosystem
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interactions among populations in a community; the community’s physical surroundings, or abiotic factors
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Organism
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anything that possesses all the characteristics of life; all organisms have an orderly structure, produce offspring, grow, develop, and adjust to changes in the environment.
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Cell
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basic unit of all organisms; all living things are composed of cells.
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Gene
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segment of DNA that controls the protein production and the cell cycle.
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Species
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group of organisms that can interbreed and produce fertile offspring in nature
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Adaptation
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evolution of a structure, behavior, or internal process that enables an organism to respond to environmental factors and lie to produce offspring
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Population
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group of organisms all of the same species, which interbreed and live in the same place at the same time.
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Natural selection
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mechanism for change in populations; occurs when organisms with favorable variations survive, reproduce, and pass their variations to the next generation.
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Evolution
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gradual change in a species through adoptions over time.
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Energy
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the ability to cause change; organisms use energy to perform biological functions
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Biology
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the study of life that seeks to provide an under-standing of the natural world.
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Environment
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biotic and abiotic surroundings to which an organism must constantly adjust; includes air, water, weather, temperature, other organisms, and many other factors.
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Growth
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increase in the amount of living material and formation of new structures in an organism; a characteristic of all living things.
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Organization
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orderly structures of cells in an organism a characteristic of all living things.
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Stimulus
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anything in an organism’s internal or external environment that causes the organism to react
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Response
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an organism’s reaction to a change in its internal or external environment.
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Response
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an organism’s reaction to a change in its internal or external environment.
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Independent variable
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in an experiment, the condition that is tested because it affects the outcome of the experiment.
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Experiment
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procedure that tests a hypothesis by collection information under controlled condition.
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Dependent variable
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in an experiment , the condition that results from changes in the independent variable.
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Dependent variable
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in an experiment , the condition that results from changes in the independent variable.
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Hypothesis
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explanation for a question or a problem that can be formally tested.
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Ethics
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the moral principles and values held by humans.
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Control
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in an experiment, the standard against which results are compared.
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