(i) (a) 6CO2 + 12H2O C6H12O6 + 6O2 + 6H2O
−−−−−
(b) C6H12O6 + 6O2 6CO2 + 6H2O + Energy
(Note: There is a printing mistake in the book in part (b))
(ii) Photosynthesis and respiration are represented by the above two reactions.
(iii) Photosynthesis takes place in green plants only, whereas respiration takes place in all living organisms.
(iv) Photosynthesis (reaction (a)) is the supporter of all the life on the Earth.