Transcript Chapter 7: Cell Structure and Function

REVIEW: Characteristics of Life
All living things are:
•Made of cells
•Grow and develop
•Reproduce
•Have genetic code (DNA)
•Obtain and use energy
•Respond to their environment
•Maintain homeostasis
•Evolve
The cell theory grew out of the work of many
scientists and improvements in the microscope.
• Many scientists contributed to the cell theory.
Scientists
1665 Robert Hooke used an early
compound microscope to look at a
thin slice of cork
(you use a cork and a
“hook” to fish)
He saw thousands of tiny chambers
he called "cells" .
Today we know that cells are not
empty.
They contain living matter.
Scientists
•Anton van Leeuwenhoek
observed pond water and
other things.
•The microscope revealed a
world of tiny living
organisms.
Scientists
•Matthias SchleidenBotanist that said all
plants are made of cells
Scientists
•Theodor Schwann- Biologist that said all
animals are made of cells
•(Schwann sound like swan = animal)
Scientists
•Rudolf Virchow- Said
cells come from other
cells
Cell Theory
•1. All living things are made of cells
Cell Theory
•2. Cells are the basic units of structure and
function in living things.
•Cells are the basic unit of life.
Cell Theory
•3. Cells come from other cells.
Cell Structure
•Cells are a variety of sizes and shapes.
•All cells have two things in common:
1) surrounded by cell membrane
2) contain DNA
Two Kinds of Cells
•Prokaryotic- Do NOT have a true nucleus or
membrane bound organelles
•Example: Bacteria
What is Bacteria?
Two Kinds of Cells
• Eukaryotic- DO have a true nucleus and membrane bound organelles
• Examples: Plants, Animals, Fungi, Protists
• Usually larger and more complex than prokaryotic cells.
• Great variety of types.
• A eukaryotic cell is similar to a factory.
Nucleus and Organelles
•PRO – NO
•EAU - DO
http://Prokaryotes vs Eukaryotes Video