1. Kingdom Protista: Multicellular Algae
Seaweeds- multicellular algae Lots of variety Complex structures Intricate reproductive strategies

2. Thallus
The complete body of an alga, not differentiated into true leaves, stems or roots.

3. General Part of Seaweed
Blades- leaf-like forms. Not true leaves. Photosynthetic
Pneumatocysts- gas-filled bladders that keep the blades afloat

4. Stipe Holdfast Stem-like part. Connect the blades and pneumatocysts.
Anchors- looks like roots but do not absorb water or nutrients like roots

5. Green Algae Phylum Chlorophyta
Found in salt water (10%), fresh water and even land
Chlorophyll is main pigment
Can be planktonic or form filaments
Common green algae is Ulva

6. Brown Algae Used in ice cream, salad dressings and puddings
Phylum Phaeophyta
Marine and cold waters
Added yellow pigments make it look brown
Algin- found in the cell walls
Used in ice cream, salad dressings and puddings
Emulsifier- keeps things mixed
3 types found in N.A.
Fucus- rockweed
Sargassum
Kelp

7. Red Algae Phylum Rhodophyta Sources of Agar Contains carrageenan-
Most abundant
Red pigments hide cholorphyll
Live in deep waters
Red pigments capture sun’s energy in low light
Sources of Agar
Used to grow bacteria on
Contains carrageenan-
emulsifier