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32 Cards in this Set
- Front
- Back
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Adaptation
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Inherited characteristic that improves an organism’s ability to survive and reproduce in a particular environment
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Biosphere
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All the parts of the planet that are inhabited by living things; sum of all Earth’s ecosystems
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Cell
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Basic unit of living matter; separated from its environment by a plasma membrane
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Consumer
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Organism that obtains food by eating producers (autotrophs) or other consumers
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DNA
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(deoxyribonucleic acid) Molecule responsible for inheritance; nucleic acid that contains the sugar deoxyribose
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Domain
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Broadest category used to classify life forms
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Ecosystem
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Community of living things plus the nonliving features of the environment that support them
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Eukaryotic Cell
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Cell with a nucleus (surrounded by its own membrane) and other internal organelles
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Evolution
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Generation-to-generation change in the proportion of different inherited genes in a population that accounts for all of the changes that have transformed life over an immense time
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Gene
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Unit of inherited information in DNA
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Homostasis
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Internal stability or “steady state” maintained by the body
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Multicellular
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Consisting of many cells
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Natural Selection
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Process by which individuals with inherited characteristics well-suited to the environment leave more offspring than do other individuals
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Organism
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Living thing
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Photosynthesis
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Process by which plants use the sun’s energy to convert water and carbon dioxide into sugars
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Population
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Group of individuals of the same species living in a particular area at the same time
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Producer
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Organism that makes its own food (autroph) and produces organic molecules that serve as food for other organisms in its ecosystem
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Prokaryotic Cell
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Cell lacking a nucleus and most other organelles
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Species
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Distinct form of life
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System
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Complex organization formed from a simpler combination of parts
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Unicellular
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Consisting of a single cell
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Controlled Experiment
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Experiment that tests the effect of a single variable
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Data
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Recorded observations or items of information
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Evidence
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Collected body of data from observations and experiments
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Generalization
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General conclusion
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Hypothesis
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Suggested, testable answer to a well-defined scientific question
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Inference
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Logical conclusion based on observations
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Model
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Physical, mental, or mathematical representation of how people understand a process or an idea
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Observation
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Use of the senses to gather and record information about structures or processes in nature
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Technology
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Application of scientific understanding for a specific purpose
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Theory
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Well-tested explanation that makes sense of a great variety of scientific observation
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Variable
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Any factor in an experiment that is not constant (any factor that can change)
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