Which of the following is the best explanation for the excurrent (pyra – McqOptions

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1.	Which of the following is the best explanation for the excurrent (pyramidal) shape of Pinus (the branches giving the plant the appearance of a tall cone) [AIIMS 1981; JIPMER 1983]
A.	Competition among adjoining trees for sunlight
B.	The effect of auxins on growth of stem tips
C.	Adaptation for wind pollination
D.	Efficiency of water transport from ground to leaves
Answer» D. Efficiency of water transport from ground to leaves

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