question_answer

In woody dicotyledons, the arrangement of vessels is either diffuse porous or ring porous. Based on the these data, which one of the following statements is correct ?                                                                                   [BHU 1994]

A) Ring porous vessels are specialised and are used for conducting more water for a shorter period only, when tyloses occur early in the vessels

B) Although diffuse porous vessels are not so specialized as ring porous vessels, they conduct more water at all periods and through new xylem vessels added gradually during development

C) Diffuse porous vessels carry more water and also faster because of a greater number of small vessels having greater capillary force

D) Ring porous vessels conduct more water as they are formed early during development, when the need for water is great