question_answer 31)

      Algal blooms impart a distinct colour to water due to (a) their pigments            (b) excretion of coloured substances (c) formation of coloured chemicals in water facilitated by physiologicaldegradation of algae (d) absorption of light by algal cell wall

Answer:

                    (a) Algal bloom impart distinct colour to water due to their pigamens Pigment composition of several groups of algae. Green algae     ?  Chlorophyll-b Brown algae    ?Chlorophyll-+fucoxanthin yellow algae    ?Chlorophyli-+fucoxanthin Red algae?Phycoerythrin, phycoyanin Blue algae       ?Phycoeryihrin, phycoyanin