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Slime Molds: Fungus-Like Protists. Do Now: Do your best to remember some biology 1 material. Question: What do the terms “haploid” and “diploid” mean? Which are you?. Slime Molds: The Weirdest Protists Ever?. “Dog Vomit” Slime Mold. Slime Molds: What Are They?. - PowerPoint PPT Presentation
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DO NOW:
DO YOUR BEST TO REMEMBER SOME BIOLOGY
1 MATERIAL .
QUESTION: WHAT DO THE TERMS “HAPLOID” AND
“DIPLOID” MEAN?
WHICH ARE YOU?
Slime Molds: Fungus-Like Protists
Slime Molds: The Weirdest Protists Ever?
“Dog Vomit” Slime Mold
Slime Molds: What Are They?Slime molds are colonial, fungus-like protists.They are chemoheterotrophs, getting their
energy by decomposing plant matter, such as mulch, or eating bacteria and yeast.
They reproduce by making spores, like fungi doThere are two types: cellular slime molds and
plasmodial slime molds The plasmodial versions spend most of their lives as a
macroscopic colony. The cellular versions spend most of their lives as single
cells, coming together only to reproduce.To the video!
Fruiting Bodies
Fruiting Bodies are the spore-forming parts of slime molds
More Fruiting Bodies
Life Cycle: Cellular Slimes
Plasmodial vs Cellular
Plasmodial slimes (like dog vomit) spend most of their lives as a diploid colonial organism.
Cellular Slimes
Cellular slimes spend most of their lives as unicellular haploid protists.
It’s when they aggregate that things get a little freaky…
1 Giant Cell? Or thousands stuck together?
Cellular slime mold colony (aka slug)This “cell” has thousands of nuclei (red dots),
but only 1 membrane
What has scientists so interested is: How can so many single cells coordinate to form one of these???
Make Those Spores
When an appropriate location is reached, the colony will begin turning the 1,000s of nuclei into spores… and the cycle continues
Spore video
So… What to Remember?
Slime molds are fungus-like protists that reproduce via spores.
Plasmodial slime molds live most of their lives as diploid colonial blobs made of many cells.
Cellular slime molds live most of their lives as unicellular haploids, but come together to form a giant colony / cell with thousands of nuclei when stressed.
Slime molds are studied for cellular communication and coordination… and because
They’re just WEIRD!