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Cell Review
review for unit 1a test
13
Science
7th Grade
03/10/2010

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Term
Cell
Definition
The basic unit of structure and function in all living things. (the basic unit of life)
Term
Cell Theory
Definition
1. All life is made from cells
2. Cells are the basic units of life
3. New cells come from other living cells
Term
Unicellular
Definition
Organisms composed of one cell
Term
Multi-cellular
Definition
Organisms composed of more than one cell
Term
Give an example of a unicellular organism
Definition
Paramecia
Term
Give an example of a multi-cellular organism
Definition
humans, fish, animals, plants
Term
organelle
Definition
Tiny cell structures that make up a cell and perform functions to keep the cell alive
Term
nucleus
Definition
directs all cell activity
Term
mitochondrion
Definition
organelle where energy is produced. the more work a cell does, the more mitochondria it has
Term
chloroplast
Definition
contains chlorophyll and performs photosynthesis for a plant cell. found only in plant cells
Term
cell membrane
Definition
the thin, flexible covering that surrounds every cell
Term
cell wall
Definition
the stiff, rigid outside covering of a plant cell
Term
cytoplasm
Definition
gel-like fluid that all the organelles float around in
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