Cell structure & Function grade 9 KFS, By Hamdy Karim
1. 3.1 Cell Theory
Science SMART Board
King Faisal School
Cell Structure and Function
Created by: Hamdy Karim
Grade level(s): 9th_Grade
Subject area: Biology
2. 3.1 Cell Theory
Cell Structure and Function
Objectives;
Students will be able to
answer the questions;
1. What is the cell theory?
2. What are the differences
between prokaryotes and
eukaryotes?
3. How do substances pass
through cells?
Done By:
Mr. Hamdy Karim
KFS, Riyadh, KSA.
4. 3.1 Cell Theory
The cell theory grew out of the work of many scientists
and improvements in the microscope.
• Many scientists contributed to the cell theory.
5. 3.1 Cell Theory
The cell theory grew out of the work of many scientists
and improvements in the microscope.
• Many scientists contributed to the cell theory.
• More was learned about cells
as microscopes improved.
6. 3.1 Cell Theory
The cell theory grew out of the work of many scientists
and improvements in the microscope.
• Many scientists contributed to the cell theory.
• More was learned about cells
as microscopes improved.
• The cell theory is a unifying
concept of biology.
7. 3.1 Cell Theory
Early studies led to the development of the cell theory.
• The Cell theory has three principles.
– All organisms are made of cells.
8. 3.1 Cell Theory
Early studies led to the development of the cell theory.
• The Cell theory has three principles.
– All organisms are made of cells.
– All existing cells are produced by other living cells.
9. 3.1 Cell Theory
Early studies led to the development of the cell theory.
• The Cell theory has three principles.
– All organisms are made of cells.
– All existing cells are produced by other living cells.
– The cell is the most basic unit of life.
10. 3.1 Cell Theory
Prokaryotic cells lack a nucleus and most internal
structures of eukaryotic cells.
• All cells share certain characteristics.
11. 3.1 Cell Theory
Prokaryotic cells lack a nucleus and most internal
structures of eukaryotic cells.
• All cells share certain characteristics.
– Cells tend to be microscopic.
Bacterium
(colored SEM; magnification 8800x)
12. 3.1 Cell Theory
Prokaryotic cells lack a nucleus and most internal
structures of eukaryotic cells.
• All cells share certain characteristics.
– Cells tend to be microscopic.
– All cells are enclosed
by a membrane.
Bacterium
(colored SEM; magnification 8800x)
cell membrane
13. 3.1 Cell Theory
Prokaryotic cells lack a nucleus and most internal
structures of eukaryotic cells.
• All cells share certain characteristics.
– Cells tend to be microscopic.
– All cells are enclosed
by a membrane.
– All cells are filled with
cytoplasm.
Bacterium
(colored SEM; magnification 8800x)
cell membrane
cytoplasm
15. 3.1 Cell Theory
There are two cell types: eukaryotic cells and prokaryotic
cells.
• Eukaryotic cells have a
nucleus.
nucleus
cell membrane
16. 3.1 Cell Theory
There are two cell types: eukaryotic cells and prokaryotic
cells.
• Eukaryotic cells have a
nucleus.
• Prokaryotic cells do
not have membrane-
bound organelles.
nucleus
cell membrane
organelles
17. 3.1 Cell Theory
There are two cell types: eukaryotic cells and prokaryotic
cells.
• Prokaryotic cells do not
have a nucleus.
nucleus
cell membrane
organelles
18. 3.1 Cell Theory
There are two cell types: eukaryotic cells and prokaryotic
cells.
• Prokaryotic cells do not
have a nucleus.
• Prokaryotic cells do not
have membrane-bound
organelles.
nucleus
cell membrane
organelles
cytoplasm