A) guttation
B) transpiration
C) evaporation
D) bleeding
Correct Answer: A
Solution :
The loss of water in the form of liquid droplets from the leaf of plant through special pore called hydathode is known as guttation. The guttated liquid contains 0.6 - 2.5 gm/litre of solutes. Bleeding is the exudation of sap or watery solution from the cut or injured parts of the plant, eg, Agave, Acer, Vitis etc. Transpiration is a the loss of water in the form of vapour from exposed parts of a plant. 98 - 99% of water absorbed by a plant is lost in transpiration. Evaporation is a physical process and takes place at the surface of non-living objects. It is controlled by the environmental conditions like relative humidity and air current.
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