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Single vs. Multicellular Organisms
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Single vs. Multicellular Organisms
📚 Part 1: Multiple Choice
1. Which of the following is an example of a single-celled organism?
Bacteria
Oak tree
Human
Dog
2. What is the main advantage of being multicellular?
Cells can become specialized for different functions
The organism uses less energy
The organism reproduces faster
The organism needs less food
3. Single-celled organisms can survive on their own because:
They are very large
One cell can perform all life functions
They don't need food or water
They live in groups
4. Which life functions must ALL organisms perform? (Check all that apply)
Get energy from food
Remove waste
Reproduce
Fly
Respond to environment
✏️ Part 2: Short Answers
5. Fill in the blanks:
In a single-celled organism, _______ cell must perform _______ the life functions needed for survival. In multicellular organisms, different cells become _____________ to perform specific jobs.
6. Explain why a single cell in your body (like a muscle cell) cannot survive on its own, but a bacteria cell can.
7. Give two examples of specialized cells in the human body and explain what job each one does.
🔬 Part 3: Compare and Contrast
8. Complete the comparison chart by listing advantages of each type of organism:
Single-Celled Organisms:
Multicellular Organisms:
9. Explain in your own words why some organisms can survive as just one cell while others need many specialized cells to live.
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