Karteikarten
Bio 103 Terms
Karten in diesem Stapel (51)
- 1Prokaryotic"before nucleus" - a cell without a true nucleus
- 2Eukaryotic"true nucleus" - the nucleus is contained within a membrane-bound sac
- 3Eubacteriatrue bacteria
- 4Archaeaorganisms that live in X-TREME environments
- 5EukaryaThe domain containing protists, fungi, plants, and animals
- 6ProducersOrganisms that make their own food using energy and simple raw materials from the environment (eg plants)
- 7ConsumersOrganisms that get energy and carbon by feeding on tissues, waste, or the remains of other organisms (eg animals)
- 8AtomFundamental building block of all matter
- 9MoleculeAn association of two or more atoms
- 10CellThe smallest unit of life (minus viruses)
- 11OrganismAn individual; consists of one or more cells
- 12PopulationGroup of individuals of a species in a given area
- 13CommunityAll populations of all species in a given area
- 14EcosystemA community interacting with its environment (the not-living bits: the amount of daylight, wind, etc.)
- 15BiosphereAll regions of Earth that hold life
- 16Critical thinkingDeliberate process of judging the quality of information before deciding whether or not to accept it
- 17ScienceSystematic study of the observable world
- 18HypothesisTestable explanation of a natural phenomenon
- 19Scientific methodSystematically making, testing, and evaluating hypotheses
- 20PredictionA statement, based on a hypothesis, about a condition that should exist if the hypothesis is correct
- 21ModelAnalogous system used for testing hypotheses
- 22Control groupGroup not exposed to the variable being tested
- 23DataFactual information from experiments or surveys
- 24Experimental groupGroup of individuals who are exposed to a variable
- 25VariableCharacteristic that differs among individuals over time
- 26Sampling errorThe difference between results derived from testing an entire group of events or individuals, and the results derived from testing a subset of the group
- 27ProbabilityThe measure, expressed as a percentage, of the chance that a particular outcome will occur
- 28Statistically significantRefers to a result that is statistically UNLIKELY to have occurred by chance
- 29Scientific theoryHypothesis that has not been disproven after many years of rigorous testing. Cannot be proven absolutely. Can be disproven by a single observation or result that is inconsistent with it
- 30Law of NatureGeneralization that describes a consistent natural phenomenon for which there is incomplete scientific explanation
- 31HomeostasisSet of processes by which an organism keeps its internal conditions within tolerable ranges by sensing and responding to change
- 32GrowthIncrease in size, volume, and number of cells in multicelled species
- 33DevelopmentMultistep process by which the first cell of a new individual becomes a multicelled adult
- 34ReproductionProcess by which parents produce offspring
- 35InheritanceTransmission of DNA from parents to offspring
- 36DNACarries hereditary information that guides development and functioning
- 37ElectronNegatively charged subatomic particle that occupies orbitals around the atomic nucleus
- 38ChargeElectrical property of some subatomic particles
Opposite charges attract; like charges repel - 39NucleusCore of an atom, occupied by protons and neutrons
- 40ProtonPositively charged subatomic particle found in the nucleus of all atoms
- 41NeutronUncharged subatomic particle found in the atomic nucleus
- 42ElementA pure substance that consists only of atoms with the same number of protons
- 43Atomic numberNumber of protons in the atomic nucleus
Determines the element - 44IsotopesForms of an element that differ in the number of neutrons their atoms carry
Changes the mass number, but not the charge - 45Mass numberTotal number of protons and neutrons in the nucleus of an element’s atoms
- 46RadioisotopeIsotope with an unstable nucleus, such as carbon 14 (14C)
- 47Radioactive decayProcess by which atoms of a radioisotope spontaneously emit energy and subatomic particles when their nucleus disintegrates
- 48TracersMolecules with a detectable substance attached, often a radioisotope
Used in research and clinical testing - 49Shell ModelModel of electron distribution in an atom
- 50IonAtom that carries a charge because it has an unequal number of protons and electrons
- 51Free radicalsSolitary atoms that have unpaired electrons
Have a very strong tendency to interact with other atoms
Interactions make them dangerous to life
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