question_answer

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