Presentation on theme: "Fungi Chapter 31. Fungi - heterotrophs - eat by absorbing nutrients - by secreting enzymes to outside which digest food around them; fungi absorbs food."— Presentation transcript:
Fungi - heterotrophs - eat by absorbing nutrients - by secreting enzymes to outside which digest food around them; fungi absorbs food. Fungi composed of hyphae - make up fungi’s mycelium (feeding network)
Fungi can reproduce sexually or asexually. Spores produced and released from parent fungi. Sexual reproduction - parent’s cytoplasm fuse together (plasmogamy). Haploid nuclei then fuse together (karyogamy)
Phylum Zygomycota –zygote fungi - mostly terrestrial; can form mutualistic relationships with plants (mycorrhizae). Unfavorable conditions - can form resistant spores to wait until conditions are favorable before germination.
Lichen result of relationship between algae and fungus. Alga gives fungus food; fungus gives alga place to grow and protection. Mycorrhizae result of relationship between plant roots and fungi. Help increase surface area for absorption to take place.
Fungal impacts Fungi important to ecosystem - help to break down inorganic nutrients that plants can use. Percentage of fungi parasitic and contribute to damaging crops and various plant species. Can also cause skin infections in humans.