Vessels are one of the type of water conducting tissue. These cells are long, cylindrical, dead cells. Vessels are absent in pteridophytes. These cells are present in all angiosperms and some gymnosperms.
Therefore, the correct answer is option D.
Which of the following statements is not true about the life cycle of flowering plants.?
Megagametophyte develops from megaspore. The megaspore enlarges into an oval-shaped structure called the embryo sac, which is termed as megagametophyte.
Thus the correct answer is 'Megagametophyte is the seed'.