Concept:Monocotyledonous seeds have one cotyledon, while dicotyledonous seeds have two cotyledons.Explanation:Maize, millet, and wheat are cereal crops and are monocotyledonous seeds.Cowpea is a legume and has two cotyledons, making it dicotyledonous.Therefore, cowpea is not a monocotyledonous seed.Answer:A. cowpea