What is a key difference between monocotyledons and dicotyledons?

The characteristic that sets monocotyledons apart from dicotyledons is indeed related to their leaf vein structure. Monocots, such as grasses and lilies, typically exhibit parallel venation, where the veins run parallel to each other from the base to the tip of the leaf. In contrast, dicots, which include plants like oaks and beans, demonstrate a net-like or branched pattern of venation that creates a more complex structure. This distinction in leaf vein arrangement is a fundamental botanical principle that helps in the classification of flowering plants.

Understanding this difference is crucial for identifying plant groups and their respective characteristics, as it not only relates to morphology but can also influence aspects such as photosynthesis efficiency and overall plant growth.