Download Cells: The Basic Units of Life

Cells: The Basic Units
of Life
10th Grade Biology
Unicellular Organisms
The following video clip
has been removed:


Bacteria
Protozoa
 Paramecium
Cells: The Basic Units
of Life, Unicellular
Organisms, United
Learning (1994.
 Ameba
10th Grade Biology
Multicellular Organisms
The following video clip
has been removed:
Cells: The Basic Units
of Life, Many-celled
Organisms, United
Learning (1994).
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Many cells join together
to perform specialized
tasks
Cells of the same type
join together to form
layers, called tissues
10th Grade Biology
Early Scientists’ Contributions
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In 1655, Robert Hooke coins the term "cell" to describe
chambers in cork
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In 1674, Anton Von Leeuwenhoek perfects techniques
for grinding a microscope lens to make the first
microscope
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In 1838, Mathais Schleiden concluded that plants are
composed of cells
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In 1839, Theodore Schwann concluded that animals are
composed of cells
10th Grade Biology
Cell Theory
 All living things are made of one or more cells
 Cells are the basic units of structure and
function of living things
 All cells come from existing cells
10th Grade Biology
What are the characteristics of living
things?
All living things…
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
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Grow
Repair and maintain themselves
Reproduce
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Undergo change
Move
Respond to surroundings
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Grow old and die.
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10th Grade Biology
Cells: The Basic Units of Life
Unicellular Organism
Plant Cell
Animal Cell
10th Grade Biology
Relative Size of a Eukaryotic Cell
500,000
500,000
400,000
300,000
200,000
100,000
0
50,000
Type written period
in textbook
Eukaryotic cell
5,000
50
Bacterium
Virus
Nanometers
Remember: 1,000 nanometers (nm) = 1 micron (µm)
1,000 microns (µm) = 1 millimeter (mm)
10th Grade Biology
Web Resources

The Biology Project
Check it out

Cells Alive
Check it out
10th Grade Biology
Cell Quiz
10th Grade Biology
Cells are made up of simple components that work
independently to keep the cell alive.
A. True
B. False
10th Grade Biology
Which of the following is true about tissues?
A. Tissues are composed of unicellular
organisms.
B. Tissues are made of specialized groups of
cells specific to each type of tissue.
C. Animal tissue is composed of cells, but
plants do not have tissues.
D. The cells of different kinds of tissues are the
same.
10th Grade Biology
Which of the following is NOT a part of the cell
theory as developed by Schleiden and Schwann?
A. All living organisms are made up of cells.
B. All new cells are created from existing cells.
C. All living organisms have a finite number of
cells they are born with.
D. Cells are the units of structure and
organization in living organisms.
10th Grade Biology
Credits
Cells: The Basic Units of Life. United Learning (1994). Retrieved March 7, 2009, from Discovery
Education: http://streaming.discoveryeducation.com/
Cell, plant. Paul Fuqua (2004). Retrieved March 8, 2009, from
Discovery Education: http://streaming.discoveryeducation.com/
Cell, animal. Paul Fuqua (2004). Retrieved March 8, 2009, from Discovery Education:
http://streaming.discoveryeducation.com/
Radiolaria. Jupiterimages Corporation (2006). Retrieved March 8, 2009, from Discovery
Education: http://streaming.discoveryeducation.com/
How big are molecular parts? (2001) Department of Biology, Davidson College. Retrieved March
8, 2009, from http://www.bio.davidson.edu/COURSES/genomics/method/sizes.html
10th Grade Biology
Correct
10th Grade Biology
Incorrect
10th Grade Biology