01:119:115 Lecture Notes - Lecture 4: Entamoeba, Nephron, Haustorium
8 Jul 2015
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Document Summary
Unikonts include protists close to animals and fungi. Amoebas with lobe or tube shaped pseudopodia. Plasmodial slime molds and cellular slime molds (figure 28. 25: plasmodial slime molds: single mass; phagocytic; produces sporangia w/haploid spores, cellular slime molds: single celled that is phagocytic; can aggregate when food scarce. Tubelinids: found in soil, freshwater and marine ecosystems, heterotrophs, e. g. Entamoebas: parasitic, entamoeba histolytica can cause dysentery, opisthokonts. Monophyletic group that includes fungi, animals and other protists. Fungi are heterotrophs that do not ingest their food but absorb it from their environment. Feed on living or non-living organisms: can produce and release hydrolytic enzymes that will digest the food material outside and then they absorb the nutrients, some use enzymes to penetrate plant cell walls and absorb nutrients within plants. Structurally, fungi can be either multicellular filaments or single cells (yeast: many species can be both, most exist as filaments, few are just yeasts.
