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FUNGUS- like PROTISTS: CAUGHT IN THEIR SLIME. JRMG 2008-2009. REVIEW. What are protists? Reason of their position in the 6-Kingdom classification scheme Why do we have to study them?. SLIME MOLDS. Presence of food source Extremely difficult to classify Ameba-like cells
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FUNGUS- like PROTISTS:CAUGHT IN THEIR SLIME JRMG 2008-2009
REVIEW • What are protists? • Reason of their position in the 6-Kingdom classification scheme • Why do we have to study them?
SLIME MOLDS • Presence of food source • Extremely difficult to classify • Ameba-like cells • Mold-like masses (spores) • Amebas and fungi • Can be: • ACRASIOMYCOTA • MYXOMYCOTA
PHLYLUM ACRASIOMYCOTA • Cellular slime molds • Individual cells (amebas) • Free living • Fast reproduction • UNFAVORABLE conditions • gather together • Primitive multicellular organism
Solid masses • Fruiting bodies • Spores (mitosis) – ameboid cells • Showed how cells communicate • Still not explained (fruiting body from a single free-living cell) http://images.google.com.ph/imgres?imgurl=http://www.nsf.gov/news/special_reports/fibr/images/dictyo_noflash.jpg&imgrefurl=http://www.nsf.gov/news/special_reports/fibr/dictyo.htm&usg=__Hztp9NYunn0hzuLZ8jUbeyF_vxs=&h=600&w=400&sz=30&hl=en&start=7&tbnid=HJv3
PHYLUM MYXOMYCOTA • Acellular slime molds • Ameba-like cell – plasmodia • Plasmodia- thousands of nucle in a single membrane • Mutinucleate cell • Fruiting bodies • Grow from the plasmodium • Spores (meiosis) – flagellated cells • Flagellated cells fuse = ameboid (2n)