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Cell Structure
Cell Structure
11
Biology
10th Grade
11/16/2010

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Term

Cell

 

Definition
The Basic Units of all forms of life.
Term
Cell Theory
Definition
One Of The Fundamental Cencepts of Biology.
Term
The Cell Theory :
Definition

 All Living Things Are Composed Of Cells.

Cells are the basic unit of structure and function in living things.

New cells are produced frorm existing cells.

Term
Cell Membrane
Definition

is a thin, flexible barrier around the cell.

 

Term
Cell Wall
Definition
a strong layer around the cell membrane .
Term
Nucleus
Definition
a large structure that contains the cell's genetic material and controls the cell's activities.
Term
Cytoplasm
Definition
The material inside of the cell membrane , but not including the nucleus
Term

Key Fact

 

Definition
Biologists divide cells into two categories : eukaryotes and prokaryotes . The cells of eukaryotes have a nucleus , but the cells of prokaryotes do not.
Term
Prokaryotes
Definition
have cell membranes and cytoplasm but do not contain nuclei. All bacteria are prokaryotes
Term
Eukaryotes
Definition
do contain nuclei . In addition to a nucleus , a cell membrane , and a cytoplasm , most cells of eukaryotes contain dozens if ither specialized structures , called Organelles , that perform important cellular functions .
Term
Organelles
Definition
that perform important cellular functions.
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