BSC 116 Lecture Notes - Lecture 7: Prototaxites, Giant Cell, Coenocyte
26 Sep 2017
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***heterotroph gets their nutrient from an organic source. Derived character for group: triple gene fusion for enzyme that makes pyrimidine nucleotides (c,t,u) Unikont came from what was believed to be ancestor having a single flagellum and single basal bods ( root of flagellum) Unikonta divided into 2 main groups: amoebozoa, slime molds, other amoebas, opithokonta, animals, choanoflagellates, fungi, nucleaiids. Unclear when fungi appeared: molecular clock: 1 gy for animal-fungi split, oldest fossil fungi: 0. 46 gy = 460 my. Fungi have more in common with animals. Shared derived character: flagellate cells propelled by posterior flagellum. For fungi: cell wall made of glucans and chitin: not all plants have glucans, arthropods use chitin, grasses use glucans, fungi use both, shared derived character: chitin and glucans (more specifically) Absorb nutrients without ingestion (unlike animals: secrete enzymes that break down many compounds: good decomposers. Single- vs. multi-celled: single-celled: yeast, multi-celled filaments: hyphae, building blocks, filaments form masses: mycelia.
