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28 Cards in this Set
- Front
- Back
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biosphere
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all the environments on Earth that support life - most regions of land, bodies of water, and the lower atmosphere.
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ecosystem
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consists of all the organisms living in a particular area, as well as all the nonliving physical components of the environment with which the organisms interact, such as air, soil, water and sunlight.
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community
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an assemblage of all the organisms living together and potentially interactin in a particular area.
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population
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a group of all the individuals belonging to one species living in a specified area
ex. all the brown pelicans in the costal community |
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organism
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an individual living thing
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organ system
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a group of organs that work together in performing vital body functions
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organ
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a structure consisting of several tissues adapted as a group to perform specific functions.
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tissue
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an intergrated group of cells with a common function, structure, or both.
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cell
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a basic unit of living matter separated from its environment by a plasma membrane; the fundamental structural unit of life.
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organelle
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a membrane-enclosed structure with a specialized function within a cell.
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molecule
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a group of two or more atoms held together by covalent bonds.
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producers
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an organism that makes organic food molecules from CO2, H2O, and other inorganic raw materials: a plant, alga, or autotrophic prokaryote.
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consumer
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an organism that obtains its food by eating plants or by eating animals that have eaten plants.
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the dynamics of ecosystems include two major processes
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the recycling of chemical nutrients and the flow of energy.
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systems biology
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an approach to studying biology that aims to model the dynamic behavior of whole biological systems.
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prokaryotic cell
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a type of cell lacking a membrane-enclosed nucleus and other membrane-enclosed organelles; found only in the domains BACTERIA and Archaea.
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eukaryotic cell
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a type of cell that has a membrane-enclosed nucleus and other membrane-enclosed organelles. All organisms EXCEPT bacteria and archaea are composed of eukaryotic cells.
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genes
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a discrete unit of hereditary information consisting of a specific nucleotide sequence in DNA (or RNA, in some viruses). Most of the genes of a eukaryote are located in its chromosomal DNA; a few are carried by the DNA of mitochondria and chloroplasts.
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life's hierarchy of organization
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Biosphere (Earth)
Ecosystem (Florida coast) Community (all organisms on the Florida coast) Population (group of Brown pelicans) Organism (Brown pelican) Organ system (Nervous, digestive system) Organ (Brain) Tissue (Nervous tissue) Cell (Nerve cell) Organelle (Nucleus) Molecule (DNA) |
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species
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a group whose members possess similar anatomical characteristics and have the ability to interbreed and produce viable, fertile offspring.
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Bacteria
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one of two prokaryotic domains of life, the other being Archaea
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Archaea
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one of two prokaryotic domains of life, the other being Bacteria
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Eukarya
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the domain that included all eukaryotic organisms.
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evolution
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Descent with modification; the idea that living species are descendants of ancestral species that were different from present day ones; also the genetic changes in a population over generations.
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natural selection
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A process in which organisms with certain inherited characteristics are more likely to survive and reproduce than are organisms with other charateristics.
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hypothesis
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A tentantive explanation a scientist proposes for a specific phenomenon that has been observed.
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theory
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a widely accepted explanatory idea that is broad in scope and supported by a large body of evidence.
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controlled experiment
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A component of the process of science whereby a scientist carries out two parallel tests, an experiemental test and a control test. The experimental test differs from the control by one factor, the variable.
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