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Cells and Heredity 1-1
Chapter 1 Section 1
10
Science
7th Grade
09/12/2012

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Term
Cell Theory
Definition
1. All living things are composed of cells.
2. Cells are the basic unit of structure and function of in living things.
3. All cells are produced from other cells.
Term
Magnification
Definition
The ability to make things look larger than they are.
Term
Convex lens
Definition
A lens with the curved shape. It is thicker at the center than at the edges.
Term
Resolution
Definition
The ability to clearly distinguish the individual parts of an object.
Term
Organelles
Definition
The smaller parts of a cell. Each organelle has a function within the cell.
Term
Cell Wall
Definition
A rigid outer layer of a plant cell. Helps to protect and support the cell. Only found in plant cells.
Term
Cell membrane
Definition
Only found in animal cells. Forms the outside of the cell. Controls what substances enter and leave the cell.
Term
Nucleus
Definition
The "brain" of the cell. The cell's control center, directing all the cell's activities.
Term
Chromatin
Definition
Thin strands within the nucleus. They contain the genetic material that direct the functions of a cell.
Term
Nucleolus
Definition
Structure in the nucleus where ribosomes are made.
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