AP BIOLOGY

Detailed explanation-1: -Veins are composed of xylem and phloem cells embedded in parenchyma, sometimes sclerenchyma, and surrounded by bundle sheath cells. The vein xylem transports water from the petiole throughout the lamina mesophyll, and the phloem transports sugars out of the leaf to the rest of the plant.

Detailed explanation-2: –Veins provide support for the leaf and transport both water and minerals (via xylem) and food energy (via phloem) through the leaf and onto the rest of the plant.

Detailed explanation-3: -The veins are the vascular tissue of the leaf and are located in the spongy layer of the mesophyll. The pattern of the veins is called venation.

Detailed explanation-4: -Leaf veins contain the conducting tissue xylem which carries water and minerals to the leaf. Phloem present in the veins transports the food (glucose) produced in the leaf during photosynthesis.

Detailed explanation-5: -Examples of plants with parallel veins are sedges, cattails, lilies, irises, and grasses (e.g., corn, rice, wheat, turf grasses).