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33 Cards in this Set

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Biosphere
The entire portion of Earth inhabited by life; the sum of all the planet's ecosystem.
Ecosystem
All the organisms in a given area, along with the nonliving (abiotic) factors with which they interact; a biological community and its physical environment.
Community
An assemblage of all the organisms living together and potentially interacting in a particular area.
Population
A group of interacting individuals belonging to one species and living in the same geographic area.
Organism
An individual living thing, such as bacterium, fungus, protist, plant or animal.
Organ System
A group of organs that work together in performing vital body functions.
Organ
A structure consisting of several tissues adapted as a group to perform specific functions.
Tissue
A cooperative unit of many similar cells that perform a specific function within a multicellular organism.
Cell
A basic unit of living matter separated from its environment by a plasma membrane; the fundamental structural unit of live
Organelle
A structure with a specialized function within a cell.
Molecule
A group of two or more atoms held together by covalent bonds.
Atom
The smallest unit of matter that retains the properties of an element.
Producer
An organism that makes organic food molecules from CO2, H2O, and other inorganic raw materials; a plant, alga, or autotrophic bacterium.
Consumer
An organism that obtains its food by eating plants or by eating animals that have eaten plants.
Decomposer
An organism that derives its energy from organic wastes and dead organisms.
Emergent Properties
New properties that emerge with each step upward in the hierarchy of life, owing to the arrangement and interactions of parts as complexity increases.
System
A more complex organization formed from a combination of components.
Prokaryotic Cell
A type of cell lacking a membrane-enclosed nucleus and other membrane-enclosed organelles; found only in the domains Bacteria and Archaea.
Eukaryotic Cell
A type of cell that has a membrane-enclosed nucleus and other membrane-enclosed organelles. All orgnaisms except bacteria and archaea are composed of eukaryotic cells.
Species
A group whose members possess similar anatomical characteristics and have the ability to interbreed.
Taxonomy
The branch of biology concerned with identifying, naming, and classifying species.
Kingdom
In classification, the broad taxonomic category above phylum or division.
Domain
A taxonomic category above the kingdom level. The three domains of live are Archaea, Bacteria, and Eukarya.
Bacteria
One of the two prokaryotic domains of life, the other being Archaea.
Archaea
One of the two prokaryotic domains of life, the other being Bacteria.
Prokaryotes
Orgnaisms with prokaryotic cells.
Eukaryotes
Organisms with eukaryotic cells.
Eukarya
The domain of eukaryotes, orgainisms made of eukaryotic cells; includes all of the protists, plants, fungi, and animals.
Theory
A widely accepted explanatory idea that is broad in scope and supported by a large body of evidence.
Natural Selection
Differential success in reproduction by differnet phenotypes resulting from interactions with the environment. Evolution occurs when natural selection produces changes in the relative frequencies of alleles in a population's gene pool.
Evolutionary Adaptation
An inherited characteristic that enhances an organism's ability to survive and reproduce in a particular environment.
Hypothesis
A tentative explanation a scientist proposes for a specific phenomenon that has been observed.
Controlled Experiment
A component of the process of science whereby a scientist carries out two parallel tests, and experimental test and a control test. The experimental test differs from the control by one factor, the variable.