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The _________(i)________ vary in colour from olive green to various shades of brown depending upon the amount _________(ii)_______
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(i) brown algae (ii) carotenoids
The brown algae mainly present in seawater/marine water having chlorophyll a, c and fucoxanthin. Brown shades of brown algae depend upon the amount of xanthophyll (fucoxanthin) which is a type of carotenoid.
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