The Homeostasis Challenge

This simple assessment can be used in a variety of ways for a life science or biology classroom. I personally have used it as an assessment, a pre-test, and/or as a group teaching activity. It's a great way to help students comprehend both the diversity and similarities of cell types, while practicing organism/cell identification based on key structures. To use, copy and paste the questions into a document or activity of your choice and add images as needed. 

Part 1: Identify the following cells as prokaryote or eukaryote

1. (insert cell picture)

2. (insert cell picture)

3. (insert cell picture)    

4. This single-celled organism has a flagella, but no nucleus

5. This bacteria causes strep throat

6. A cheek cell from inside your mouth

7. A multi-cellular organism

8. A cell with only a membrane, cytoplasm, ribosomes, and a nucleus.

Part 2: Identify the following cells as plant, animal, or bacteria

9. (insert cell picture)

10. (insert cell picture)

11. (insert cell picture)

12.  This cell has a cell wall, but no nucleus

13.  This cell has both a cell wall and a nucleus

14.  This cell contains centrioles

15.  This cell contains chloroplasts

16.  This cell contains ribosomes, but no membrane-bound organelles

Part 3: For the following, identify which organelle(s) would be most numerous to complete the specified job.

17.  A digestive cell that needs to make a lot of enzymes

18.  A cell that must release many chemicals in order to communicate

19.  A cell that requires a lot of energy

20.  A green cell inside a plant leaf

21.  A white-blood cell that protects the body by devouring and digesting bacteria

Part 4: For the following, what do you think would be the biggest challenge to maintaining homeostasis (staying alive)?

22.  A warm-blooded animal that lives in the arctic

23.  A plant that lives in the desert

24.  A fish that lives in salt water

25.  A plant that lives on the floor of the rainforest

Part 5: Predict what would happen to the following cells.

26.  A cell in freshwater

27.  A cell in saltwater

Part 1: Identify the following cells as prokaryote or eukaryote

1. varies depending on chosen picture

2. varies depending on chosen picture

3. varies depending on chosen picture

4. prokaryote

5. prokaryote

6. eukaryote

7. eukaryote

8. eukaryote

Part 2: 

9. varies depending on chosen picture

10. varies depending on chosen picture

11. 

varies depending on chosen picture

12. bacteria

13. plant

14. animal

15. plant

16. bacteria

Part 3: 

17.  ribosomes (and/or rough endoplasmic reticulum)

18. golgi apparatus

19.  mitochondria

20.  chloroplast

21.  lysosomes

Part 4

22. staying warm

23. finding water

24. avoiding dehydration/hypertonic conditions

25. obtaining sunlight

Part 5:

26. gain water/swell

27.  lose water/shrink

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