The Algae By Mr. B.

What are Algae? Eukaryotic plants (autotrophs) Can be –Unicellular –Multicellular as filaments, or multicellular leaflike Found at varying depths in water There are salt and fresh water varieties

Unicellular (Protist-like Algae) Chlamydomonas

Alternation of Generation – Asexual vs. Sexual

Green algae Cellulose cell walls Unicellular (chlamydomonas) or multicellular (like Ulva) Chlorophyll a/b Store starch Gave rise to land plants Chlorophyta

Volvox – Colony of Algae Cells

Volvox – Look Closely at the Cells communicating Cells “talk” and can even produce gametes

Spirogyra – another Chlorophyte Colony Conjugation – swapping gametes

Brown algae (kelp) Cellulose cell walls Multicellular Chlorophyll a/c, xanthophylls Stores carbohydrates Phaeophyta

Typical Brown Algae

Heard of the Sargasso Sea

Kelp forests form entire ecosystems

Red algae Cellulose cell walls Most multicellular Chlorophyll a & d Stores starch Harvested for agar and carrageenan (emulsifier in ice cream) Rhodophyta

Nori - Red Algae used in Sushi