Prescott's Microbiology
Prescott's Microbiology
10th Edition
ISBN: 9781259281594
Author: Joanne Willey, Linda Sherwood Adjunt Professor Lecturer, Christopher J. Woolverton Professor
Publisher: McGraw-Hill Education
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Chapter 26, Problem 1MI

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?

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Summary Introduction

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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