Green Algae• Phylum ____________• Habitat: widespread in

marine and ______ water

• Notes:– Very diverse group, hard

to generalize about their ecology

– May be _________, filamentous or colonial, or multicellular

Filamentous Green Algae_________

has spiral-shaped __________

• Filamentous with spiral chloroplast in each cell

• Forms green “____” in ponds• Pyrenoids (sites of starch

storage) occur in the chloroplast• Asexual reproduction is by

__________ of the filament.

CHLOROPHYTA--SPIROGYRA

Spirogyra _________, a form of sexual reproduction

another filamentous Green Algae __________

__ Star-shaped chloroplasts per cells

a colonial Green Algae … _______________ colony with Daughter

colonies

Mother Colony

Daughter Colony

• SPHERICAL COLONY OF ____________ CELLS (colony is motile)

• Flagella on one side, ___ ___ ____ on other

• ASEXUAL REPRODUCTION:– A SURFACE CELL DROPS INSIDE

BALL AND BY _______ PRODUCES DAUGHTER COLONY.

– PARENT COLONY EVENTUALLY ______ TO RELEASE DAUGHTER COLONIES.

CHLOROPHYTA--Volvox

Colonial Green Algae, Volvox

Daughter cells remain attached to the parent cells COLONY

Male and female colonies form different germ cells. ______ cells are formed by division. The female germ cells do not divide. They enlarge to form an ova.

In some species the colonies are ____________.

http://www.plingfactory.de/Science/GruKlaOeko/Teichleben/Algen/Oedogonium%20sp..jpg

Oedogonium thallus

http://www.botit.botany.wisc.edu/images/130/Chlorophyta/Oedogonium_Images/Zoospore_MC.low.jpg

Oedogonium

Here the filaments are out of focus.The asexual __________ is in focus.

http://www.csupomona.edu/~jcclark/classes/bot125/resource/graphics/g/chl_oedogonium.jpg

http://www.biologie.uni-hamburg.de/b-online/fo44/18.jpg

OedogoniumThis is the zoospore, or maybe it is the sperm. Both have the same look!

When both oogonium and

__________ appear on the same filament the alga is

___________.

• ________ fresh-water algae

• some cells of the filament become oogonia (egg-producing structures)

• some cells become antheridia (____-producing structures)

• sexual and _____ reproduction

CHLOROPHYTA – Oedogonium

• Filamentous fresh-water alga

• ______ reproduction is by zoospore production

CHLOROPHYTA--Ulothrix

• Sexual reproduction involves flagellated ___________