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Red Algae
![Red algae.[Credits : Eric Guinther]](http://media-2.web.britannica.com/eb-media/83/118083-003-A2024930.gif)
Marine algae, of the phylum rhodophyta in which chlorophyl is masked with a red or purplish pigment. They are mostly abundant in tropical seas and are capable of trapping sunlight in deep marine waters. Some can aid in reef building AND carrageenan which is used in ICE-CREAM Wooopeee! Biology at it's absolute best right there, guys.
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Brown Algae
Abundant in temperate seas. Algin makes up the cell wall and is used as a thickening agent in foods. Their chlorophyll is masked by brown and yellow pigments.
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Green Algae
Grow almost everywhere and bear the greatest resemblance to land plants than any other algea. They also have the same pigments as land plants [chlorophylls] they possess cellulose in the cell walls and store carbohydrates such as starch.
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