Each of the three Protistan groups we examined today resembles a true fungus in
ID: 3166268 • Letter: E
Question
Each of the three Protistan groups we examined today resembles a true fungus in some way. Briefly explain why each of these three do not belong in the kingdom Fungi. 1. The three most abundant phyla in the kingdom Fungi, the Zygomycota. Ascomycota, and Basiciomycota, are defined not just by differences in their DNA and evolutionary history, but also by significant morphological differences. What would you need to see to definitively identify a member of each of these groups? 2. The diploid stages of the fungal life cycle are usual very brief returning to a haploid condition through meiosis shortly thereafter. Why are the diploid stages important to the sexual life cycle? 3. 4. Define "coenocytic" and "dikaryotic". Why are these terms significant in the fungal life cycles? 5. What are some of the human commercial uses for fungi?Explanation / Answer
Zygomycota forms mostly zygospores (created by nuclearfusion of haploid cells) as their sexual spores.
Most Ascomycetes produce ascospores in asci, as their sexual spores.
In Basidiomycota sexual reproduction occurs by means of basidia and basidiospores.
Sexual reproduction causes genetic variation into a population of fungi. Sexual reproduction in Fungi often occurs in response to adverse environmental conditions. So, the diploid phase or the sexual reproduction is a life saving process in them in adverse condition.
Fungal mycelia in which hyphae lack septa are known as coenocytic.
When fungi undergo a reproductive phase in which more than one genetically distinct nuclei is present within the same cytoplasm. In the Ascomycota and Basidiomycota, this phase is termed as dikaryotic, whereas in other fungal phyla the phase is heterokaryotic.
Mushrooms are grown and collected for food for thousands of years.
Harmless fungi is used to control pathogenic bacteria and insect pests on crops.
Some of the fungi are used for wine making.
Fungi are used to produce antibiotics.
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