AlgaeBen, Anna, Pranavi

Phaeophyceae or Brown Algae 

It consists of Multi cellular marine algae , that is mostly kelps

There are around 1500–2000 species of brown algae

Famous for the 4 membranes around their chloroplasts

It differs in size from a few cells to the giant kelp that can grow up to 45 feet

One thing that separates them from other algae is that all brown algae are multi cellular

Structure of Brown Algae The holdfasts are for

anchoring themselves to the bottom of the ocean

The Float keeps it above the water

The Stipe Is the Structure of the Brown Algae or kelp

It lacks a  xylem and phloem

Red Algae Lack flagella; gametes rely on water

currents to get together Have phycoerythrin pigment that

makes them red Not all are red; species differ in their

proportions of accessory pigments. Most abundant in warm, coastal

waters of tropical oceans, deep as 260 m

Dulse - edible species with leafy form

Irish moss- used in ice cream

Irish moss

Dulse

Green Algae Mostly aquatic Photosynthetic Plantae Structure Alternation of generations Green

Volvox Type of green algae Spherical colony (500-50,000 cells) Movement: flagella Freshwater Protoplasmates Asexual reproduction: gonidium cells divide and make daughter colonies, flagella are inwards, invert when size of parents, parents dieSexual reproduction: gonidium cells make sperm and egg cells

Volvox colony

Volvox cells

Euglena Protist aquatic Unicellular flagellate Heterotrophic (phagocytosis) and autotrophic characteristics 3 membrane chloroplasts (from green algae), eyespot Binary fission

Sea Lettuce type of green algae Edible Emits hydrogen sulphide when decomposing

Euglena (binary fission)

Euglena

Sea lettuce

http://www.youtube.com/watch?v=5fg3Q-hbSsI

Alternation of Generations Green algae and red algae