Topic: ANATOMY OF FLOWING PLANTS

Q:

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

 

(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 specialised 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
Answer:  Ring porous vessels conduct more water as they are formed early during development , when the need for water is great
Explanation:  

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