BIOL 1202 Lecture Notes - Lecture 8: Ascus, Zygomycota, Meiosis
Document Summary
31. 1 fungi are heterotrophs that feed by absorption (cid:1) Fungi are heterotrophs, but do not ingest their food. 02/20/2015: secrete exoenzymes into their surroundings that break down complex molecules, absorb smaller organic molecules. Fungi exhibit diverse lifestyles: decomposers, a. k. a. , saprotrophs, parasites, mutualistic symbionts (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) (cid:1) The morphology of multicellular fungi enhances absorption of nutrients. Fungi consist of hyphae that are grouped together into mycelia. Most fungi have cell walls made of chitin. Some fungi have hyphae divided into cells by septa, with pores allowing cell-to-cell movement of materials. Some fungi have hyphae that allow them to capture animals and penetrate the tissues of their hosts. Mycorrhizae are mutualisms between fungi and plant host: ectomycorrhizae surrounds root cells, endomycorrhizae extends hyphae through root-cell wall. 31. 2 fungi produce spores through sexual or asexual life cycles (cid:1) (cid:1) (cid:1) 02/20/2015: cell fusion plasmogamy, heterokaryotic stage is between plasmogamy and karyogamy.
