1. 1. The tree below is mostly made from carbohydrates (cellulose). Explain why plant cells still need ribosomes, rough ER, and a Golgi apparatus.

2. 2. Explain how unicellular protists are able to swim in a liquid environment. Use scientific vocabulary in your answer.

3. 3. The micrograph below shows the cells in a sunflower stem. Identify the organelle labeled “A” and describe its function. A

4. 4. Explain why plants wilt if they are not watered.

5. 5. A large food molecule enters a muscle cell from the bloodstream. Describe how it will be processed by a lysosome.

6. 6. Identify the cell below as animal, plant, or bacteria, and defend your answer with TWO pieces of evidence.

7. 7. Describe the function of the organelle labeled “I.”

8. 8. Explain why both plant and animal cells require mitochondria.