Answer:
Properties of water
that make it useful for all biological processes on the earth areWater is the
major solvent through which mineral nutrients enter a plant from the soilsolution.
(ii) It is an ideal
solvent with neutral pH.
(iii) Water,
is the major constituent of protoplasm. It constitute approximately 90% of
theprotoplasm.
(iv) Water
act as a medium for translocation of nutritive,substances. Mineral nutrients
are absorbed by the roots. Carbohydrates that are formed during photosynthesis
are transported by water from cell to cell, tissue to tissue and organ to
organ.
(v) In
plants, water is involved in photosynthesis by incorporating hydrogen atom
intocarbohydrate and oxygen atoms are further released as 
.
(vi) Water
act as agent for temperature control. The specific heat of water helps plant in
maintaining a relative stable internal temperature.
(vii) In
some plants water is necessary for pollination. Like in bryophytes and
pteridophytes ,they essentially require water for the fertilisation process.
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