Classification

Kingdom Protista

Algae’s / Seaweeds

• Multicellular, Plant-Like Protists• Autotrophic • The algae’s / seaweeds

Algae’s / Seaweeds

• Division Chlorophyta: Green Algae’s– Evidence that land

plants evolved from green algae's• Contain both

chlorophyll a & b, as do land plants

• Cell walls made of cellulose, like those of land plants

Halophila ovalis

Ulva lactuca

Tetraselmis

Volvox Spyrogyra

Algae’s / Seaweeds

• Division Rhodophyta: Red Algae’s– Phycoerythrins: red in

color, allowing them to live much deeper than other algae's

– Carageenan: emulsifier used in cosmetics, paints, & ice cream

Algae’s / Seaweeds

• Division Rhodophyta: Red Algae’s– Secrete calcium

carbonate skeleton that holds coral reefs together

Algae’s / Seaweeds

• Division Phaeophyta: Brown Algae’s

– Fucoxanthin: brown algae vary in color, from olive green to dark brown because of this pigment

– Algin: Thickens & emulsifies dairy & baking goods

Algae’s / Seaweeds

• Division Phaeophyta: Brown Algae’s– Kelp Forests forms the foundation of many

temperate coastal ecosystems

Algae’s / Seaweeds

• Division Phaeophyta: Brown Algae’s

– Sargassum form huge drifting mats