01:119:116 Lecture Notes - Lecture 4: Nucleariida, Unikont, Sister Group
21 Jul 2019
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Document Summary
Lecture 4 - unikonta: the evolution of fungi, origin of fungi. There are 5 major groups within the fungi: colonization of land, general characteristics of fungi, nutrition and ecology. Fungus usually grow in moist and warm areas: body structure. Hyphae - long branched fragment: specialized hyphae. Aerial hyphae - aids in spore dispersal. Spores - a single cell - starts a new individual. Dispersed by wind, water or animals: sexual. Many mating types = no male or female. Number of mating types depends on the number of alleles. When chemical signals they send out don"t match they mate because it means they aren"t clones. Heterokaryon - cells contain multiple haploid nuclei (n+n) Results in a zygote - 2n cell. Molds - filamentous fungi, produce spores by mitosis. Mitosis or budding: asexual, fungal diversity, c hytrids. Derived characteristics - fungal spores = zoospores (spores with flagella) Derived characteristics - form zygospores in zygosporangia.
