Question

Vessels are found in

• A. All angiosperms and some gymnosperm
• B. Most of the angiosperms and few gymnosperms
• C. All angiosperms, all gymnosperms and some pteridophyta
• D. All Pteridophyta

Answer 1

The correct option is B Most of the angiosperms and few gymnosperms

The vessel, also called as the trachea, is the important component of the Xylem. It is present in the most of the flowering plants and absent from most gymnosperms and ferns, vessels are thought to have evolved from tracheids by the loss of the end walls.
A vessel consists of a vertical series of vessel members that vary from elongated to squat, drum-shaped cells the walls of which are secondarily thickened with rings, spirals or networks of cellulose, that later become lignified.
Therefore, the correct answer is option B.