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31 Cards in this Set

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