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25 Cards in this Set

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