Biology 2013 JAMB Past Questions - Question 16: During the manufacture of food by plants, which of the following organisms use energy from the sun?

Correct Answer

D

Explanation

Anabaena just like other blue  green algae like oscillatoria and Nostoc are found mainly in fresh water and damp places on land. They have dispersed or patches of chlorophyll throughout the cytoplasm ie. chlorophyll note closed with the chloroplasts for trapping light energy for" photosynthesis. They exist as single ceils or colonies of long chains of identical ceils. Nitrosomonas and nitrobacter are nitrifying bacteria which oxidise a m m o n i a ( product decomposition of dead plants and animals) to nitrite which in turn is oxidised to nitrate. Sulphur bacteria oxidise hydrogen sulphide to sulphur releasing chemical energy.