Download Notesheet 7 - OG

Notesheet 7.1 Life is Cellular
Let’s see what you remember about cells…
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5.
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8.
Cells
- Cells are known as the “_____________ ___________” of all living
things
- Organisms made of one cell are called _____________________
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Organisms made of many cells are called ____________________
Discovery of the Cell
- What major scientific invention led to the discovery of cells?
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What English scientist coined the term “cell”? How did he come up
with it?
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What scientist used a microscope to examine bacteria and other
microscopic organisms from pond/drinking water and even his
mouth?
Types of Microscopes (p. 192)
1. _____________________________________ - Can view cells, cell
structures, magnifies 500x; use stains to dye certain cell parts
2. _______________________________________ - Produces
stunning 3D images; magnifies 3750x; can be black/white or color
by using a computer
3. ________________________________________ - Produces 2D
images because samples are cut in thin slices; magnifies 4375x
What do all cells have in common?
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Cells come in all kinds of shapes and sizes
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But all cells have a ____________________________, which is a
thin, flexible barrier that surrounds the cell
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The Cell Theory is made up of 3 statements:
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1.
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2.
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3.
How are cells different?
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Cells fall into 2 broad categories based on the presence or absence
of a _____________________ - a large, membrane-enclosed
structure that contains genetic material called DNA
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The 2 categories are prokaryotes and eukaryotes
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__________________
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No nucleus (DNA floating)
- __________________________
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______________________
- Multi-cellular
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Small and simple
- __________________________
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Some swim or glide along
Vs.
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____________________
surfaces
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Ex: ___________________
- Ex: _______________________
What about viruses?
Are viruses considered cells? _______ Are they alive? _______
- Viruses are _____________________________

Made of proteins, nucleic acids (DNA or RNA) and sometimes
lipids (you know them as fats)
Viruses can only reproduce by ________________________

This goes against the cell theory
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What’s a capsid? ___________________________________
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A virus that infects bacteria is called a __________________
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