•since there are two “seed leaves” or cotyledons in each of these seeds, beans are classified as dicots (“di”= two cotyledons). is this consistent with the venation pattern of bean leaves?

The arrangement of the pattern of the veins on the leaf is referred as the venation of the leaf.

The monocots and the dicots exhibit different venation pattern. The monocots generally exhibit the parallel venation pattern. While, the dicots represent reticulated venation.  

This difference is present due to the presence of number of cotyledons in the seed.