Final answer:
A dicotyledonous leaf is composed of epidermis, mesophyll, and vascular tissues. These tissues perform various functions in the leaf, including protection, photosynthesis, and transportation.
Step-by-step explanation:
A dicotyledonous leaf is composed of several tissues. These include:
- Epidermis: The outermost layer of cells that covers the leaf and helps reduce water loss.
- Mesophyll: The middle layer of cells where photosynthesis occurs. It is further divided into two types: the palisade mesophyll, which contains tightly packed cells that perform most of the photosynthesis, and the spongy mesophyll, which has loosely arranged cells and allows for gas exchange.
- Vascular tissue: Consists of xylem and phloem, which transport water, nutrients, and sugars throughout the leaf.
The diagram of a dicotyledonous leaf would show these tissues clearly labeled and arranged in the leaf structure.