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 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 ___________ _.

Oedogonium thallus

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

Oedogonium This 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 ___________