Brooks Biodiversity Unit 2 Exam with 100% Correct Answers

Brooks Biodiversity Unit 2 Exam with 100% Correct Answers The Primary role of Fungi - answerDecomposers- they break things down Modes of Nutrition in Fungi - answerHeterotrophs with extracellular digestion Exoenzymes - answerFungi Release these enzymes outside of the cell wall. Break down complex molecules into smaller organic molecules which can be absorbed. Extracellular Digestion - answerThe release of exoenzymes out side of the cell wall, followed by the absorption of nutrients.. Saprobes - answerFungi that feed on non-living/dead organisms Symbionts - answerFungus that lives with another living organism (form a symbiotic relationship) Mutualism in Fungi - answerboth organisms benefit, neither is harmed. Ex: Lichens - fungi and algae (cyanobacteria) Ex: Mycorrhizae - fungi and plant roots Commensalism - answerOne organism benefits, the other is unharmed Parasitism - answerOne organism benefits, the other is harmed Examples of Parasitism in Fungi - answerEx: 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 - answerParasitic relationship with fungus and plant. Occurs on wheat Ergots - answerParasitic relationship with fungus and plant that occurs on rye and gives hallucinogenic sensations Botrytis Mold - answerParasitic relationship with fungus and plants that occurs on strawberries Fungi Characteristics - answer1. Heterotrophic 2. Extracellular Digestion 3. Chitin-Based Cell wall 4. Most fungi are made up of filaments called Hyphae Hyphae - answerfilaments (long and branching) that make up the structure of a fungus In most fungi, hyphae are the main mode of vegetative growth Hyphae are Septate or Coenocytic Yeast - answerYeast is a unicellular fungi and do not have/grow hyphae MOST FUNGI ARE MULTICELLULAR, BUT YEAST IS UNICELLULAR Septate - answerYou can see the cell separation because the nuclei are confined in and separated by cell walls Think "separate" Coenocytic - answerYou cant see the cell separation. It is multinucleated meaning that there are multiple nuclei not separated by a cell wall Thallus/Mycelium - answercollectivel