No, pine trees are not monocots; they are classified as gymnosperms, which are a type of dicot.
Pine trees belong to the family Pinaceae and are characterized by their needle-like leaves and cones. The classification of plants into monocots and dicots is based on various features, primarily seed structure and leaf venation patterns. Monocots, such as grasses and lilies, typically have one seed leaf (cotyledon) and parallel leaf veins. In contrast, dicots, which include most flowering plants and trees like pines, possess two seed leaves and have a branching vein structure in their leaves.
Additionally, gymnosperms, the category under which pines fall, are known for producing seeds that are not enclosed within a fruit, unlike angiosperms (flowering plants). The unique reproductive features and growth patterns of pine trees further distinguish them from monocots.