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20 Cards in this Set
- Front
- Back
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biosphere
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all the environments on Earth that support life
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ecosystem
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all the organisms living in a particular area and nonliving (abiotic) components with which they interact (sunlight, air, water, etc)
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community
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entire group of organisms in a particular ecosystem
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population
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all the individuals of a species living in a specified area
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organism
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individual living thing
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organ system
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several organs that work together in performing specific functions
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organ
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structure consisting of several tissues adapted as a group to perform specific functions
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tissue
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an integrated 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; fundamental structural unit of life
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organelle
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a membrane-bound structure that performs a specific function in a cell
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molecule
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cluster of atoms held together by chemical bonds
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emergent properties
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new properties that emerge with each step upward in the hierarchy of life, owing to the arrangement and interactions of parts as complexity increases
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producers
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organisms that make organic food molecules from CO2, H2O, and other inorganic raw materials (plants, prokaryotes)
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consumers
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organisms that obtain their food by eating producers or other animals that have eaten producers
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prokaryotic cell
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a type of cell lacking a membrane-enclosed nucleus and other membrane-enclosed organelles; in domains Bacteria and Archaea
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eukaryotic cells
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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
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species
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term used for a particular type of organism
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domains
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three overarching groups into which the kingdoms of life are organized
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evolution
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idea that species living today are descendants of ancestral species
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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 characteristics
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