2. Be a Thinker! Identify the organelle and its function.

3. Be a Thinker! Identify the organelle and its function.

4. Be a Thinker! Identify the organelle and its function.

5. Be a Thinker! Identify the organelle and its function.

6. The basic unit of all life is
A) the cell B) tissues C) systems D) organs

7. 2.3 Organisms Can Be Single-Celled or Multi-celled
Copy This Down
Did you hear about the cat who swallowed a ball of yarn?
She had mittens!
2.3 Organisms Can Be Single-Celled or Multi-celled
Objectives: 1. Understand the differences between unicellular and multicellular organisms
2. To look at various microorganisms that are unicellular and multicellular.

8. Being Knowledgeable: Definitions
Copy This Down
Cells are the individual, living units that make up all living organisms.
Multicellular
Made of 2 or more cells
Unicellular
Made of just one cell
Micro-organisms
Generally unicellular organisms that can be seen only through a microscope

9. Being Knowledgeable: Unicellular Vs. Multi-cellular
Copy This Down
Being Knowledgeable: Unicellular Vs. Multi-cellular
Unicellular organisms
Developed specialized structures to perform functions such as eating, moving, reproducing, excreting and reacting to stimuli

10. Being Knowledgeable: Unicellular Vs. Multi-cellular
Copy This Down
Being Knowledgeable: Unicellular Vs. Multi-cellular
Multi-cellular organisms
Rely on many very specialized cells to perform functions such as to eat, to move, to reproduce, etc…
All the cells interact with one another
Ex. To eat- cells for digestion, cells for absorption, cells for carrying nutrients throughout body, cells for the muscle to move

11. Being Open-Minded: Discovering new creatures
Copy This Down
Being Open-Minded: Discovering new creatures
Amoeba
Lives in water
Moves around using pseudopodia
Foot-like projections
‘False feet’
A pseudopod is extended and the cytoplasm fills it
Moves very slow
Also uses the pseudopodia to eat by surrounding their food (algae, bacteria, plant cells) to create a vacuole

12. Amoeba

13. Amoeba Eating

14. Amoeba Eating

15. Being Open-Minded: Discovering new creatures
Copy This Down
Being Open-Minded: Discovering new creatures
Paramecium
Moves very fast in the fresh water
Covered in cilia to move
Hair like structures that move back & forth
Cilia also used to capture food (algae) by channeling food to an oral groove
Forms a food vacuole to be digested

16. Paramecium

19. King Kong Vs Godzilla!

20. Be a Communicator: With a partner, is this a unicellular or multi-cellular organism. How do you know??

21. Be Open Minded:
Do you think unicellular organisms are simplistic vs multi-cellular organisms??

22. Be an Inquirer: Mini-Lab!
Let’s look at some micro-organisms!
Determine:
1) is the organism unicellular or multi-cellular.
2) some of the organelles that you have studied.
3) practice diagramming a microorganism of your choice.

23. Being Principled: Homework!
Copy This Down
Being Principled: Homework!
P. 114 Check & Reflect
Questions 1, 2, 4
Video or microorganisms in pond water: