Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
Publisher: Cengage Learning
ISBN: 9781305389892

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
Publisher: Cengage Learning
ISBN: 9781305389892


Chapter 30, Problem 7TYK
Textbook Problem

A zygomycete is characterized by

a. usually, aseptate hyphae.

b. mostly sexual reproduction.

c. absence of + and − mating types.

d. the tendency to form mycorrhizal associations with plant roots.

e. a life cycle in which karyogamy does not occur.

Expert Solution
Summary Introduction


Fungi have several major lineages; one of the phyla of fungi is Zygomycota. Approximately, phylum Zygomycota has thousand species of zygomycetes. It consists of fungi that sexually reproduces by zygospores.

Explanation of Solution

Explanation for the correct answer:

Option (a) states that the zygomycetes are the fungi that sexually reproduce by the structures called zygospores. Sexual reproduction can also take place by mycelia of different mating types (+ or −). The aseptate hyphae confer the flow of nutrients easily from the tip of absorptive hyphae to other where reproductive parts develop. Hence, option (a) is correct.

Explanation for the incorrect answer:

Option (b) states that in sexual reproduction, the mating of two different hyphae takes place, whereas in asexual reproduction, the haploid spore gives rise to a new branching mycelium when it lands to a favorable condition. As zygomycetes can perform both sexual as well as asexual mode of reproduction. So, it is an incorrect option...

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