A) all angiosperms and some gymnosperms
B) most of the angiosperms and few gymnosperms
C) all angiosperms, all gymnosperms and some pteridophytes
D) all pteridophytes
Correct Answer: B
Solution :
Most angiosperms have vessels except a few (eg, Drimys, Tetracentron, Trochodendron). The gymnosperms, as a rule, lack vessels but these are found in the order Gnetales. Vessels are the constituent of xylem complex tissue. They are composed of row of cells placed one above to other. Transverse wall of these cells is absent due to dissolution.
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