Question

Dissolued arugen in water comes from
w Photosynthesis d aquatic plants
beillusion d atmospheric 'origen
o Ocidation
d Both a & b​

Answer 1

Answer:

d is the correct answer

Answer 2

Answer:

A. Van Neil in 1931 showed that photosynthetic bacteria fixed CO

2

in the presence of H

2

S and postulated that plants evolve O

2

by splitting H

2

O, not CO

2

.

B. Robin Hill in 1937 isolated chloroplast suspended in water in presence of a suitable hydrogen acceptor (for example, ferricyanide) which evolve oxygen in presence of light. He demonstrated that the source of O

2

during photosynthesis is water and not CO

2

.

C. Ruben and Kamen in 1941 used radioactive oxygen

18

O and supplied water as H

2

18

O and proved that oxygen evolved was part of water.

Hence, all the statements are correct.So, the correct answer is D.