Compare the nodes and branches that lead to the monophyletic taxa Basidiomycota and Ascomycota. How do they differ from those leading to Zygomycota and Chytridiomycota? What can be concluded from this?
Fungi composed of an enormous group of organisms, nearly 90,000 species of fungi have been identified. The molecular technique applications combined with morphological as well as ecological considerations have led to an understanding of fungal phylogenetic relationships. Chytridiomycota, Ascomycota, Glomeromycota, Basidiomycota, Zygomycota, and Basidiomycota are considered as the six major fungal groups.
Explanation of Solution
Basidiomycota is filamentous fungi made of the hypha. In general, they reproduce sexually by the formation of specialized club-shaped cells, called basidia. Whereas Ascomycota, sac fungi, are filamentous fungi that reproduce sexually by means of the ascus,
Chytridiomycota and Zygomycota are situated at multiple nodes, whereas Ascomycetes and Basidiomycetes are located only at one node. From this, it can be concluded that the former (Chytridiomycota and Zygomycota) are paraphyletic (multiple origins), whereas the latter (Ascomycetes and Basidiomycetes) are monophyletic (one common ancestor).
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Chapter 26 Solutions
Prescott's Microbiology
- Differentiate between the Ascomycota and the Basidiomycota in terms of the cells that produce spores and the spores produced. Differentiate between a cleistothecium, apothecium, and perithecium/pseudothecium. Differentiate among the main groups for basidiomycetes in the Friesian system: the Agaricaceae, Boletaceae, Cantharellaceae, Hydnaceae, Clavariaceae, Thelephoraceae, Polyporaceae, Gasteromycetes, and Jelly fungi.Identify members of the categories in Matchmaker: Gilled, Boletes, Polypores, Toothed, Veined, Morels etc., Cups, Bird's Nest, Corals Clubs, Jelly Fungi, Crusts, Puffballs, Truffles, and Other.arrow_forwardCreate a terminal (final) “couplet” for a dichotomous key that could be used to differentiate Ascomycota from Basidiomycota based on their sexual reproductive structures.arrow_forwardFor Ascomycota, what structure's function is most similar to the function of a mushroom? a.) Ascus b.) Ascocarp c.) Antheridium d.) Archegonium e.) Ascosporearrow_forward
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- For each of the four groups of perfect fungi (Chytridiomycota, Zygomycota, Ascomycota, and Basidiomycota), compare the body structure and features, and provide an example.arrow_forwardWhat is heterospory?briefly comment on its significance.give two examples?arrow_forwardDescribe the life cycle of a member of the Basidiomycota including the following terms/structures: basidiocarp, basidiospore, basidium, clamp connection, dikaryotic, diploid, haploid, karyogamy, meiosis, monokaryotic, plasmogamy, primary mycelium, secondary mycelium, tertiary mycelium. Differentiate between homothallism and heterothallism. Differentiate between unifactorial (bipolar) and bifactorial (tetrapolar) heterothallism.arrow_forward
- What is the difference between primary and secondary hyphae found in the ascomycetes and basidiomycetes? What is the ploidy of the hyphae that make up an ascocarp or basidiocarp?arrow_forwardDescribe the orders Dilleniales, Caryophyllales and Characterize each order based on the characters given in the first column of Table 1. Table 1. Key characteristics of Dilleniales, Caryophyllales and Cucurbitales. Character Dilleniales Caryophyllaes Cucurbitales 1. Plant habit 2. Plant type (monoecious, or dioecious, etc.) 3. Leaf type 4. Leaf shape 5. Flower characteristic 6. Fruit morphology 7. Seed size/shape 8. Special seed characteristic (if any) 9. Other characteristics (aromatic, etc.)arrow_forwardUsing specific examples, distinguish between the life cycles and reproductive structures of the 3 major fungal divisions: Basidomycota, Ascomycota, and Zygomycota.arrow_forward
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