question_answer 24)

  A piece of wood having no vessels (trachea) must be belong to (a) teak                                (b) mango                           (c) pine                                 (d) palm

Answer:

                  (c) Pine It is a gymnosperm. The plants belonging to this group do not have vesselsinstead, they have trachieds. Whereas teak, mango and palm are angiospermic trees. Angiospermic xylem contains vessels, tracheids, parenchyma and fibers.