1. 1. Explain why the cells of a multicellular organism do not all
look the same. Use scientific vocabulary in your answer.

2. 2. Explain how a pancreas cell knows that it should produce and secrete insulin after a meal.

3. 3. Explain why the nuclear membrane is dotted with pores.

4. 4. Identify the organelle labeled “B,” and describe its function.

5. 5. Identify the organelle labeled “C,” and describe its function.

6. 6. Identify the organelles labeled “A,” and describe their function.

7. 7. Identify the structure labeled “D” in the diagram, and explain why it is needed.

8. 8. The micrograph below shows a cell taken from the liver of an alcoholic. Explain why this cell contains an abundance of smooth ER.