Red, Brown, and Green Algae

1. Red, Brown, and Green Algae By Alessandro RestitutoMoriyonDamas Perez Gonzalez and Tiny

2. Red Algae • Also knows as Rhodophyta • One of the oldest eukaryotic algae • 5000-6000 different species, mostly multicellular

3. Tell me more about Red Algae • Characterized by having no flagella or centrioles • Use floridean starch as food • Phycobiliprotein accessory pigments (that’s what makes them red!) • Most red algae are marine and reproduce sexually, although their sperm are immobile and depend on currents • Red Algae are photosynthetic, and use CO2 or HCO3 depending on whether or not they are exposed to the atmosphere

4. Yeah, but what makes Red Algae Cool? • The oldest red algae fossil, Bangiomorphapubescens, is also the oldest eukaryote fossil ever found, dating 1200 million years. • Red Algae is also a founding father of limestone reefs, starting with solenospores in the Cambrian Period • Red Algae have a double cell wall, the inner wall made of cellulose, and the outer wall composed of agar, which is used to make jelly

5. Brown Algae • Also known as Phaeophyceae • 1500-2000 species which vary greatly from eachother • Typically exist in the Northern Hemisphere

6. Learn about Brown Algae near YOU • Brown algae belong to a large group, Heterokontophyta, of eukaryotic organism • Contain the pigment fucoxanthin, which makes them green-brown • Unique in that they develop differentiated tissues • Reproduce through flagellated spores and gametes

7. Who is Brown Algae? • Brown algae come in many different shapes and sizes, from the microscopic Ectocarpus to the 150 meter long Macrocystispyrifera • Haploid brown algae form different forms of gametes, while diploid brown algae form zoospores • Their food reserves are typically complex polysaccharides and sugars

8. Green Algae • Green algae are a large group of algae from which the higher plants emerged • Appear as unicellular or colonial flagellates, usually with two flagella per cell

9. You don’t say… • Green algae have chlorophyll a and b, giving them their green pigment, and have stacked thylakoids • Undergo open mitosis without centrioles • Used by other species to aid in their photosynthesis or paired symbiotically with fungi

10. GREENALGAEGREENALGAEGREENALGAEGREENALGAEGREENALGAEGREENALAGEGREENALGAGREENALGAEGREENALGAEGREENALGAEGREENALGAEGREENALGAEGREENALAGEGREENALGA • Evolved directly from cyanobacteria • Reproduce in several ways • Some unicellular cells undergo mitosis • Haploid algae cells fuse with one another to from long filaments of algae • Some large non-motile cells can be fertilized by a smaller motile one

11. ♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥ • ♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥ • ♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥ • ♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥ • ♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥ • ♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥ • ♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥ • ♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥♥