Prentice Hall Biology (California)
Prentice Hall Biology (California)
1st Edition
Kenneth R. Miller, Levine
ISBN: 9780132013529
Textbook solutions

All Solutions

Section 21.2: Classification of Fungi

Exercise 1
Step 1
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**Common molds**: contains zygotes formed during the sexual phase of the molds life cycle

**Sac fungi**: has an ascus, a reproductive structure that contains spores.

Step 2
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**Club fungi**: has a specialized reproductive structure that resembles a club

**Imperfect fungi**: scientist are unable to observe a sexual phase in their life cycles

Exercise 2
Step 1
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**Conidia** are formed at the tips of specialized hyphae called **conidiophores**. Conidia lands in an ideal environment then grow into haploid mycelium and grow into a sac fungus, which is described as a process of asexual reproduction.
Exercise 3
Step 1
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The sac fungi has the largest number of species
Result
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see explanation for solution
Exercise 4
Step 1
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An ascus forms within the fruiting body and has two nuclei of different mating types to form a diploid zygote. The basidium forms on the gills on the underside of mushroom caps.

Exercise 5
Step 1
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The bread mold uses both types of reproduction and certain conditions for it to reproduce. In sexual reproduction, hyphae from two different mating types form gametangia. The sporangium reproduces asexually by releasing haploid spores produced by meiosis. Meiosis occurs when conditions become favorable and the zygospore germinates.
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