question_answer

Which one of the following categories of organisms do not evolve oxygen during photosynthesis ?

A)  Red algae

B)  Photosynthetic bacteria

C)   plants with Kranz anatomy

D)  Blue green algae

Correct Answer: B

Solution :

Red algae,  plants arid blue green algae use light energy for reducing  to organic compounds and water  as a source of electrons. Hence, oxygen  is evolved    but in case of photosyiithetic bacteria, light energy is used for  reduction but water is never used as source of electrons, hence,  is never   evolved   during   bacterial photosynthesis.