PRESCOTT'S MICROBIOLOGY
PRESCOTT'S MICROBIOLOGY
11th Edition
ISBN: 2818440045677
Author: WILLEY
Publisher: MCG
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Chapter 25.4, Problem 4CC
Summary Introduction

Fungi are eukaryotic, spore-bearing organisms and they have absorptive nutrition. They are terrestrial organisms, distributed from polar to nonpolar part in the world. They are saprophytes, obtain nutrients from various dead organic materials by the release of degradative enzymes into their surroundings. The enzymes released into the environment are involved in the absorption of soluble products and the process is known as osmotrophy. They can degrade complex organic materials into simple organic compounds and other inorganic molecules, therefore, fungi are considered as important decomposers. Fungi serve to the release of carbon, phosphorus, nitrogen, and other important constituents from dead organisms. Hence, these molecules are available for other living organisms.

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Mycorrhizal fungi live in the soil and interact with the roots of plants.  Essentail nutrients (e.g. nitrogenous compounds) are taken from the soil by the fungi and transferred to the plant roots.  The fungi extract carbohydrates from the plant roots.  What type of interaction is occurring?
Mycorrhizal fungi form obligate symbiotic relationships within plants. They are able to fix N2 into a usable form of nitrogen. In exchange, they receive nutrition from the plant. Which of the following is a true statement concerning mycorrhizal fungi?   a) Finding a host plant is not crucial to their survival. b) They are a dominant species. c) They cannot survive without the host plant. d) They are considered plant parasites.
The complete mass of fungal cell filaments that forms a fungus is called a: a)  Hypha. b)  Mycelium. c)  Spore. What Division of fungi produce spores in sac-like structures, morels are an example, and many form cup-like structures in addition to the sac-like sporangia? a)  Zygomycota. b)  Ascomycota. c)  Basidiomycota. 3. lichen is best described as: a) a Plant b)  A fungus. c)  An alga. d)  A symbiotic relationship between algae or cyanophyta; and fungi. 4. The Oomycota and slime molds are members of the Kingdom Fungi. a)  True. b)  False. 5. Into which taxon would you classify the following organism: a multicellular eukaryote, with a cellulose cell wall, that is photosynthetic, and has a number of tissues? a)  Excavata. b)  SAR. c)  Metazoa. d)  Plantae. 6. Which statement is not true of plant alternation of generations? a)  A gametophyte makes gametes. b)  A sporophyte is 2n. c)  A spore fuses with another spore to…
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