BIOL 1407 Lecture 5: ACC BIOL 1407 Exam #5 Study Guide
Document Summary
Hyphae: grow like fractal animals (cid:0) keep repeating hyphae: feeding hyphae: responsible for absorption of nutrients from the environment, haustoria: ends of hyphae specialized for invading the host. Digesting cell membranes and cell wall to get inside host: reproductive hyphae: capable of going through mitosis/meiosis to produce spores, septate cs. coenocytic hyphae. Septate hyphae: windows between hyphae to exchange material (cid:0) joined cytoplasms. Coenocytic hyphae: no filtering between two hyphae (cid:0) one, long continuous. Mycelium: mass of hyphae cell, joined cytoplasms: increases surface area without adding genetic diversity. Cell walls: made of chitin (found in exoskeletons) Non-motile: not capable of moving the entire mycelium around. Heterotrophic absorptive heterotrophs: saprobes: release chemicals onto and live off of dead matter. Most common kind of fungus: parasites: release chemicals onto living organisms, predators: hunt other fungi or animals, mutualistics: lichen, mycorrhizae. Resiliency: less sensitive to ph changes, temperature, salt, etc. Age of fungi fossils: 550-500 mya: oldest fossil 450 mya.
