1. Chrysophyta Approx. 10,000sp Unicellular Fresh & marine habitat
Silica glass shells
Benefits: photosynthetic
Diatomaceous Earth
Cleaners & filters
Yellow or brown
Ex. Diatoms

2. Dinoflagellata Approx. 1,100 sp Unicellular
Cell wall composed of cellulose
Most marine
Contains orange and yellow pigments
Ex. Fire algae
Benefit: food chain

3. Euglenophyta Unicellular Approx 1000 sp No cell wall Green
Most fresh water
Ex. Euglena
Benefits: producer

4. Chlorophyta Approx. 7,000 sp Unicellular, colonial, multicellular
Green
Cell wall made of cellulose
Soil, rocks, trees, fresh water
Benefit: food chain, photosynthetic
Ex.: Spirogyra, volvox

5. Rhodophyta Approx. 4,000 sp. All multi cellular
Cell wall: cellulose, caragreenan
Red pigments
Marine (deep waters)
Ex. Red Algae

6. Phaeophyta Approx, 1500 sp. Multicellular
Cell wall: cellulose, alginic acid
Brown pigments
Fresh and marine
Benefit: food: rich in minerals, habitat, food chain
Ex. Kelp