Question

the main vein of a leaf carries ​

Answer 1

It contains a prominent midrib at the center of the leaf blade which is the main vein. ... The petiole has tiny tubes, that connect the veins on the leaf blade to the stem. Few of these enable water transport to the leaf while the other carry food away from the leaf to other parts of the plant.

Answer 2

Answer:

• The presence of midrib is mostly at the back part of a leaf.
• It works as storage for the stomata.
• Leaf’s blade is the expanded form. In the side of mid rib its structure is very thin.
• The main role of Midrib to keep the leaf in suitable position or in straight position.
• It keeps leaf strong and protect it with external factors like wind. Its primary vein has vascular bundles-food nutrients and conduction of water.
• It is also helpful for leaf to be exposed to the sunlight.