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Biology Chapter 1 Vocab
Bio quiz
18
Biology
Undergraduate 1
08/31/2011

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Term
Population
Definition
Organisms of the same species in a particular area
Term
Organism
Definition
An individual; complex individuals contain organ systems
Term
Organ System
Definition
Composed of several organs
working together
Term
Organ
Definition
Composed of tissues functioning together for a specific task
Term
Tissue
Definition
A group of cells with a common structure and function
Term
Cell
Definition
The structural and functional unit of all living things
Term
Molecule
Definition
Union of two or more atoms of the same or different elements
Term
Atom
Definition
Smallest unit of an element composed of electrons, protons, and neutrons
Term
Ecosystem
Definition
A community plus
the physical environment
Term
Biosphere
Definition
Regions of the Earth’s crust,
waters, and atmosphere inhabited by living things
Term
Independent Variable
Definition
something that is changed by the scientist
Term
Dependent Variable
Definition
something that might be affected by the change in the independent variable
Term
Controlled Variable
Definition
a variable that is not changed
Term
Adaptions
Definition
modifications that make an organism suitable for an environment
Term
Life cycle
Definition
Life - Death
Term
Reproduction
Definition
making other organisms like themselves
Term
Energy
Definition
capacity to do work
Term
Metabolism
Definition
the build up and breakdown of matter to obtain or store energy.
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