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1. Members of the family rhodophyceae commonly known as red algae.
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1. Members of the family phaeophyceae are commonly known as the brown algae.
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2. Photosynthetic pigments are phycoerythrine and phycocyanin.
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2. Photosynthetic pigment are fucoxanthin, chlorophyll a, chlorophyll c and other carotenoids.
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3. Floridean starch is the reserve food material present in the red algae.
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3. Laminarin and Manitol is the reserve food materials present in the brown algae.
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4. Cell wall contains physcocolloid like agar and carrageenin.
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4. Cell wall contains cellulose and phycocolloids the alginic acid.
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5. Unicellular form is present.
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5. Unicellular forms are completely absent.
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