Final answer:
Chloroplasts and cell walls are two structures found only in plant cells, with chloroplasts performing photosynthesis and cell walls providing structural support and protection.
Step-by-step explanation:
Two structures that are only found in plant cells are chloroplasts and cell walls. Chloroplasts are responsible for photosynthesis, the process by which plants convert sunlight into energy. They contain chlorophyll, a pigment that gives plants their green color and captures light energy. Cell walls provide structural support and protection for plant cells, giving them a rigid shape. They are composed of cellulose, a complex carbohydrate.
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