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Chapter 7
chap 7
11
Biology
9th Grade
10/22/2007

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Term
Cell
Definition
-The basic unit of life
Term
Cell theory
Definition

-All living things are composed of cells

-Cells are the basic units of structure and function in living things

-New cells are produced from existing cells

Term
Nucleus
Definition
-Large membrane-enclosed structure that contains the cell's genetic materal in the form of DNA

-Controls many of the cell's activities
Term
Eukaryotes
Definition
Cells that DO contain a nuclei
Term
Prokaryotes
Definition

-cells that DONT contain a nuclei

Term
Organelle
Definition
- "little organ"

-Specialized organs
Term
Cytoplasm
Definition
portion of the cell outside of the nucleus
Term
Nuclear Envelope
Definition
-composed of two membranes

-surrounds the nucleus
Term
Chromatin
Definition
Consists of DNA bound protein

Spread throughout the nucleus
Term
Chromosomes
Definition
contain the genetic info that is passed from generation to generation
Term
Nucleolus
Definition

Where the assembly of ribosomes begins

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