What do you think of when you hear the word CELL?
Cell Theory
With your table, you will have 3.5 minutes to view each of
the next 3 slides and answer the questions posed in your
notebook. Work as a group.
1.
Is this living or non-living?
Why do you think that?
2.
Is this living or non-living?
Why do you think that?
3.
Is this living or non-living?
Why do you think that?
What were some common features in the 3 pictures?
What were some different features in the 3 pictures?
Which 1 picture was NOT living? Why?
What things do these cells have in common?
You will work with your partner to
complete the webquest regarding the
Cell Theory.
Warm up:
1. What makes something living?
2. What is the most basic unit of living things?
Cell Theory...The major players
Hans and Zacharias Janssen
1590's
Dutch father and son
Spectacle-makers
Experimented with lenses in a tube
First compound microscope
.
Robert Hooke
1665
English
Observed slices of cork
Named them "cells"
Francesco Redi
1668
Italian
Biogenesis
Life comes from life
Anton van Leeuwenhoek
Dutch
1674
Used a very simple microscope
Described single-celled organisms
Called them animalcules
Robert Brown
1831
Scottish
Discovered the nucleus in plant cells
Matthias Schleiden
German
1838
Botany (plants)
Plants are made of cells
Theodor Schwann
German
1839
Animals are made of cells
Cell is basic unit of animal structure
"Schwann Cells" (nerve cells)
Rudolph Virchow
German
1855
"Think Microscopically"
Cells come from other cells
Cells get sick; not the whole organism
Louis Pasteur
French
1864
Disproved Spontaneous Generation
The Cell Theory
1.All organisms consist of 1 or more cells
2. Cells are the basic unit of structure and function in a
living thing
3. All cells come from pre-existing cells
Prokaryote vs Eukaryote
Cytoplas
m
Prok
aryot
e
Euka
ryote
Cell
Membran
e
Nucleu
s
Organelle
s
DN
A
Ribosome
s
EXAMPLES
What makes a virus different from bacteria?
Specialized cells...
Function:
Form fits function:
Function:
Form fits function:
Function:
Form fits function:
Function:
Form fits function:
Warm up
2. Name at least 1 scientist who contributed to cell theory
and explain his contribution.
Use the sites linked to our class webpage to identify cell
parts in plant and animal cells.
Define the functions and answer the questions.
Why are cells so small????
How does the size of a blue whale cell compare to
the size of a tadpole cell?
What makes a blue whale different from a tadpole
when considering cells?