Download Cell Theory, Prokaryotes and Eukaryotes

Warm-Up #2
10/8/12
1) What does the word cell mean?
2) What do cells make?
3) Is this alive? Why/Why not?
4) Is this alive? Why/why not?
Unit 2 Tests & Unit 3 Vocab
 Label your grade sheet to reflect the unit 2
test and your current grade in class.
 Once you get your test back, you will make
corrections to get back 1 point for each
missed
 You must write out the entire question and
answer to get credit.
 Do this on your own paper!!
 Complete your vocab list when finished
with the test
Cell Theory,
Prokaryotes,
Eukaryotes,
Multicellular,
Unicellular
What We’re Going To Learn…
 Essential Question :

Does the basic
understanding of
a cell give an
understanding of
life?

I Can:

Differentiate
between :

prokaryotes and
eukaryotes

Cell Theory and
Contributors

Multicellular and
unicellular
Cells and Scientists

Cells are the basic units of life.

Mathias Schleiden concluded that all
plants were made of cells.

Theodor Schwann concluded that all
animals were made of cells.

Rudolph Virchow proposed that all cells
come from existing cells.

Together these discoveries make up the
cell theory.
Cell Theory
 All living things are composed
of cells.
 Cells are the basic units of
structure and function in living
things.
 New cells are produced from
existing cells.
Multicellular
 Multi--Many
 More than one cell
 Cells must work together
 Cells specialize – do special jobs
Unicellular
Uni—One
ONE CELL
Dominant life
form on Earth
One cell does
everything
Cells
 Cells fall into two categories

Eukaryotes

Prokaryotes
Prokaryotes
 NO NUCLEUS
 The genetic material is a simple
DNA chain in a circle
 NO Membrane-bound organelles
 Cells are small
 Cells are simple
 Unicellular
 Ex. Bacteria
Eukaryotes
 NUCLEUS
 The genetic material is found inside
the nucleus
 Membrane-Bound organelles
 Cells are larger
 Cells are more complex
 Can have 1 or more cells (multicellular)
 Examples: Plants, animals, protist and
fungi
Prokaryotes and Eukaryotes
 All cells have:

Cell membrane

DNA at some point in their
lives

Ribosomes
Is It Alive?
How do you know one is alive and the other isn’t.
Make a list with your partner.
Earthworm
Gummy Worm
Characteristics of Life
To be living must….
1.
Made up of cells or cell
parts
5.Maintain
Homeostasis
2.
Response to Stimulus in
the environment
6.Ability to Reproduce
3.
4.
Obtain and use energy
(Autotrophs
/Heterotrophs)
Grow and Develop
7.Adapt over time
8.Universal Genetic
Code or DNA