A continuous rains during monsoon, a blue green layer is developed on moist soil of village streets making them slippery.
(a) Which group of organism is responsible for this blue green layer ?
(b) What is the possible reasons for increases crop yield after addition of blue green layer to the fields ?
(c) Name one blue green alga which is a good source of proteins .

Answer

(a) Blue green alage (Cyanobacteria)
(b) Many blue green known to fix atmopheric nitrogen and improve the fertiilizy of the soil.
C Spirulla