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31 Cards in this Set
- Front
- Back
animal
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Multicelled, motile heterotroph that has embryonic stages and usually tissues, organs, and organ systems.
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archaea
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Evolutionarily distinct domain of prokaryotic organisms.
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atom
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Fundamental form of matter that has mass and takes up space, and cannot be broken apart by everyday means.
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bacteria
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The most widespread and diverse group of prokaryotic organisms.
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biosphere
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All regions of the Earth’s waters, crust, and atmosphere where organisms live.
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cell
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Smallest living unit, with a capacity to survive and reproduce on its own.
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classification system
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A way of organizing and retrieving information about species.
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community
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All species living and interacting in some habitat.
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control group
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A group used as a standard for comparison with an experimental group.
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deoxyribonucleic acid
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See DNA.
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DNA
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Deoxyribonucleic acid. Carries the primary hereditary information for all living organisms and many viruses.
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ecosystem
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An array of species and their physical environment.
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energy
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Capacity to do work.
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Eukarya
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Domain of eukaryotic cells; all protists, plants, fungi, and animals.
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experimental group
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A group upon which an experiment is performed, and compared with a control group.
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fungus
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fungi; Eukaryotic heterotroph that obtains nutrients by extracellular digestion and absorption; notable for prolific spore formation.
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hypothesis
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In science, a possible explanation of a phenomenon, one that has the potential to be proven false by experimental tests.
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molecule
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Two or more atoms of the same or different elements joined by chemical bonds.
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mutation
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Heritable change in DNA.
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natural selection
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Microevolutionary process; the outcome of differences in survival and reproduction among individuals that differ in the details of their heritable traits.
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organ
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Two or more tissues arrayed in a specific pattern and interacting in some task.
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organ system
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Two or more organs interacting chemically, physically, or both in a task.
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plant
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A multicelled photoautotroph with well-developed roots and shoots.
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population
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Group of individuals of the same species in a specified area.
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prediction
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Statement about what you expect to observe in nature.
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protist
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One of the mainly single-celled species of eukaryotes traditionally grouped in the catch-all “kingdom Protista.” Currently being classified into groupings that reflect evolutionary relationships.
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scientific theory
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An explanation of the cause of a range of related phenomena; has been rigorously tested but is still open to revision.
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species
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One kind of organism. Of species that reproduce sexually, one or more groups of natural populations in which individuals interbreed and are reproductively isolated from other such groups.
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test, scientific
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A means to determine the accuracy of a prediction, as by conducting experiments, making observations, or developing models.
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tissue
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Of multicelled organisms, a group of cells and intercellular substances that function together in one or more specialized tasks.
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variable
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A specific aspect of an object or event that may differ over time and among individuals. In an experimental test, a single variable is directly manipulated in an attempt to support or disprove a prediction.
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