Which one is incorrect for vessels?
Tracheids are elongated or tube-like cells with thick and lignified walls and tapering ends.
Vessel is a long cylindrical tube-like structure made up of many cells called vessel members, each with lignified walls and a large central cavity. The vessel cells are also devoid of protoplasm. Vessel members are interconnected through perforations in their common walls. The presence of vessels is a characteristic feature of angiosperms. Vessels do not have tapering ends