Bio 111 Exam 3 University of Michigan-Flint 2023

Characteristics of true fungi - 1) eukaryotic 2) complex multicelluar 3) heterotrophic by absorbtion 4) cell walls are composed of chitin 5) adults are haploid and exhibit Haploid sexual life cycle 6) fungi reproduce very well asexually (mitosis) -spores 7) no motile stage in their life cycles 8) composed of hyphae 9) hyphae typically form interwoven mass called a mycelium Chitin - complex nitrogen polyscachanide Haploid sexual life cycle - fusion of gametes, produces a zygote (spore) which undergo meiosis and produce haploid spores/cells (meiospores) meiospore - spores are common to all fungi - spores are common to all fungi hyphae - filaments which consist of tubular cell walls surrounding the cell membrane and cytoplasm of cells 2 types of hyphae - septate and aseptate septate hyphae - seperate nuclei into individual cells (mitosis w/ cytokenisis) aseptate/coenocytic hyphae - mass of cytoplasm w/ hundreds or thousands of nuclei (multinucleated) (mitosis w/o cytokenisis) mitosis w/ cytokenisis - septate hyphae function