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Biology 2.1 Cell TheoryTHIRD LESSON.notebook
1
Skill Dev. The Discovery of Cells
- magnify objects, making them appear larger than they are
Microscope observations of organisms led to the discovery of cells.
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Why are microscopes used?
Skill Dev. Types of Microscopes
11 Compound Light Microscope
22 Electron Microscope
SEM - Scanning Electron Microscope
TEM - Transmission Electron Microscope
Skill Development Cell
- the smallest unit that can perform all of life's processes
Click the image to watch Tim and Moby discuss the building blocks of life.
Skill Dev. Unicellular Organisms
A unicellular organism is composed of one cell.
All of life‛s activities occur within that single cell.
Skill Dev. Multicellular Organisms
In a multicellular organism, each cell carries on most of the major functions of life.
But so are plants and fungiAnimals are a major
group of multicellularorganisms
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Skill Dev. Cell Theory 1
11
Typical Plant Cellclick here
Typical Animal Cell
All living things are composed of one or more cells.
Biology 2.1 Cell TheoryTHIRD LESSON.notebook
2
Skill Dev. Cell Theory 2
22 Cells are the basic unit of structure of all living things.
33 All presently existing cells arose from previously existing cells.
Skill Dev. Cell Theory 3
and repair of all multicellular organisms.
growth
The ability of cells to divide to form new cells is the basis for all
reproduction
click the star to reveal
Guided Practice Calculating Magnification
Eyepiece Lens Power X
ObjectivePower=Total
Magnification
erase to reveal