PHAEOPHYTA

• Multicellular algae that grow mostly on tropical and subtropical waters
• Produce food by photosynthesis (chlorophyll a and c, and fucoxanthin (special yellow-brown carotenoid)
• Reproduce asexually by production of spores, and sexually through the union of haploid gametophytes released from the spores
• Kelp can grow more than 60m in length
• Rockweed can grow on rocks
• Has 2 flagella on reproductive cells
• Produce Algin which is used in making ice cream,

  lotion, and plastics
• Contains vitamins and minerals (iodine which can be made into antiseptics such as the Tincture of Iodine