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11 C Fungus like protists►Fungus like protists
Heterotrophic, need moist environments Cell walls of cellulose (not chitin) Motile Example: water molds & slime molds
1. Water molds- Phylum Oomycota► Aquatic members live on dead or decaying
organic matter (like dead fish)► Land members parasitize plants blights
(crop loss)► Ex. Irish Potato famine (1845-1847) Ireland’s
population 8mil to 4 mil go to USA
► Asexual reproduction: sporangia produce zoospores that swim away
► Sexual reproduction: sperm and ova with fertilization tubes
2. Slime molds – (DECOMPOSERS!)► 2 phased life cycle-
feeding phase – mold looks like amoeba, eats bacteria & organic matter (slimy white/yellow/red mass)
Reproductive phase - fruiting bodies produce spores
2. Slime molds- cont’d►A. Phylum Acrasiomycota – cellular slime
molds Amoeba like, unicellular, crawl in moist
areas decomposing When food scarce – gather together into
colony (called pseudoplasmodium) looks like slimy slug forms fruiting bodies
2. Slime molds- cont’d►B. Phylum Myxomycota
– cellular plasmodial slime molds Plasmodium is multinucleate – cells all come
together and cell walls dissolve, creeps like a blob & phagocytizes organic matter
When food is scarse fruiting body form sspores haploid cells emerge fuse do mitosis without cytokinesis new plasmodium