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Cells: The Basic Units of Life
Chapter 3:section 1 - Life Science - ISBN#: 0-03-073164-X year: 2004
9
Science
7th Grade
09/24/2010

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Term
Tissue
Definition
a group of cells that work together to perform a specific job in the body.
Term
Organ
Definition
Two or more tissues working together to perform a specific job.
Term
Organ System
Definition
Organs work together in groups to perform particular jobs.
Term
Organism
Definition
Anything that can live on its own.
Term
Unicellular
Definition
A single cell living on its own. (Most of these you must use a microscope to see)
Term
Multicellular
Definition
Made of many cells.
Term
Population
Definition
a group of organisms that are of the same kind and that live in the same area make up a population.
Term
Community
Definition
Two or more different populations (species) living in the same are make up a community.
Term
ecosystem
Definition
the community of organisms and their nonliving enviroment.
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