The diagram shows a leaf viewed in cross-section under the microscope. What are tissues 1, 2 and 3?
- A1: epidermis; 2: palisade mesophyll; 3: spongy mesophyll
- B1: epidermis; 2: spongy mesophyll; 3: palisade mesophyll
- C1: palisade mesophyll; 2: epidermis; 3: spongy mesophyll
- D1: spongy mesophyll; 2: palisade mesophyll; 3: epidermis