Final answer:
To differentiate between monocots and eudicots, one should look at the leaf vein patterns and count the number of cotyledons in seeds; monocots have parallel veins and one cotyledon, while eudicots have a network of veins and two cotyledons.
Step-by-step explanation:
One way to tell the difference between monocots and eudicots is by examining the venation pattern in the leaves. Monocots typically have leaves with veins that run parallel to each other, whereas eudicots (true dicots) display a network of veins in their leaves that form a reticulated pattern. Furthermore, another distinguishing characteristic is the presence of one cotyledon in monocot seeds, like corn, contrasted with the two cotyledons found in the seeds of eudicots, such as beans.