David E. Sadava, David M. Hilliss, H. Craig Heller,May Berenbaum
ISBN #9781429219624
9th Edition
580 Questions
Homework Questions
This section highlights the diversity of the fungal kingdom, emphasizing the unique characteristics of yeasts as unicellular fungi. It covers the structure of fungi including hyphae and mycelia, the importance of chitin in fungal cell walls, and various reproductive strategies such as budding, spore formation, and dikaryosis. Additionally, it underscores the ecological role of fungi in decomposition, nutrient recycling, and symbiotic relationships with plants, while also noting their significance as model organisms and in food production.
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CONCEPT
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Which statement about fungi is not true? a. A multicellular fungus has a body called a mycelium. $b$. Hyphae are composed of individual mycelia. $c .$ Many fungi tolerate highly hypertonic environments. $d$. Many fungi tolerate low temperatures. $e .$ Some fungi are anchored to their substrate by rhizoids.
The absorptive heterotrophy of fungi is aided by $a .$ dikaryon formation. $b$. spore formation. $c .$ the fact that they are all parasites. $d$. their large surface area-to-volume ratio. $e .$ their possession of chloroplasts.
Which statement about fungal nutrition is not true? a. Some fungi are active predators. b. Some fungi form mutualistic associations with other organisms. c. All fungi require mineral nutrients. $d .$ Fungi can make some of the compounds that are vitamins for animals. e. Facultative parasites can grow only on their specific hosts.
Which statement about dikaryosis is not true? a. The cytoplasm of two cells fuses before their nuclei fuse. $b$. The two haploid nuclei are genetically different. c. The two nuclei are of the same mating type. $d .$ The dikaryon stage ends when the two nuclei fuse. $e .$ Not all fungi have a dikaryon stage.
Reproductive structures consisting of one or more photosynthetic cells surrounded by fungal hyphae are called $a$. ascospores. $b .$ basidiospores. c. conidia. $d .$ soredia. $e .$ gametes.