Questions in plant-water-relation

Select	Question
	Which of the following is called necessary evil
	In most of the thin leaf mesophytes, the leaf stomata open during day and close during night. It comes under
	Which of the following methods may be used to determine the quantitative loss of water from two surfaces of a dorsi-ventral leaf
	The number of stomata present per $c{{m}^{2}}$ of leaf is
	Which process is favoured by transpiration
	Of the processes which occur in leaves, the one which may lower their temperature (cooling effect) is
	The following percentage of water absorbed by herbaceous plants is lost in transpiration
	Transpiration occurs through
	Guard cells differ from epidermal cells in having
	Stomata open at night and close during day in