Brooks Biodiversity Unit 2 Exam Questions & Answers!

The Primary role of Fungi - ANSWER-Decomposers- they break things down Modes of Nutrition in Fungi - ANSWER-Heterotrophs with extracellular digestion Exoenzymes - ANSWER-Fungi Release these enzymes outside of the cell wall. Break down complex molecules into smaller organic molecules which can be absorbed. Extracellular Digestion - ANSWER-The release of exoenzymes out side of the cell wall, followed by the absorption of nutrients.. Saprobes - ANSWER-Fungi that feed on non-living/dead organisms Symbionts - ANSWER-Fungus that lives with another living organism (form a symbiotic relationship) Mutualism in Fungi - ANSWER-both organisms benefit, neither is harmed. Ex: Lichens - fungi and algae (cyanobacteria) Ex: Mycorrhizae - fungi and plant roots Commensalism - ANSWER-One organism benefits, the other is unharmed Parasitism - ANSWER-One organism benefits, the other is harmed Examples of Parasitism in Fungi - ANSWER-Ex: Fungus as a human parasite (Athelete's Foot) Ex: Fungus as a plant parasite 1. black stem rust on wheat 2. ergots on rye 3. strawberries with botrytis mold 4. pink ear rot of corn Black Stem Rust - ANSWER-Parasitic relationship with fungus and plant. Occurs on wheat Ergots - ANSWER-Parasitic relationship with fungus and plant that occurs on rye and gives hallucinogenic sensations Botrytis Mold - ANSWER-Parasitic relationship with fungus and plants that occurs on strawberries F