In Gymnosperms the seeds are not enclosed by ovary wall whereas in angiosperms ovary wall is invariably present. Thus Cocoa tree is an Angiosperm because its seeds are present inside the fruit (covered by ovary wall).2 people found this useful. JD Heyl.nd gymnosperm are seed pla … nts having the ovules borne on open scales, usually in cones, and usually lacking true vessels in the woody tissue, including seed ferns, or conifers. Locust trees are angiosperms because a dried fruit called legume comes from the locust trees or flowers. Ibrahim El-Osery.