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Chapter 24: Problem 12

The fungi that do not reproduce sexually used to be classified as _____. a. Ascomycota b. Deuteromycota c. Basidiomycota d. Glomeromycota

Short Answer

Expert verified
b. Deuteromycota

Step by step solution

01

Understand the question

Identify the characteristic we are looking for: fungi that do not reproduce sexually.
02

Familiarize with the options

Review the given options who are Ascomycota, Deuteromycota, Basidiomycota, and Glomeromycota.
03

Recall relevant classifications

Understand that Ascomycota, Basidiomycota, and Glomeromycota are classified based on their sexual reproduction structures (ascus, basidium, and symbiotic relationships respectively).
04

Identify Deuteromycota

Recall that Deuteromycota (also known as Fungi Imperfecti) used to include fungi that did not have a known sexual reproduction stage.
05

Choose the correct answer

Select Deuteromycota as the fungi classification that does not reproduce sexually.

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Key Concepts

These are the key concepts you need to understand to accurately answer the question.

Ascomycota
Ascomycota is one of the largest phyla of fungi. It is known for its sac-like structure called the ascus, which contains spores. Ascomycota can reproduce both sexually and asexually. Common examples include yeasts, molds, and morels.
  • Sexual reproduction involves the formation of an ascus.
  • Asexual reproduction often involves conidia, which are asexual spores.
  • Ascomycetes are significant in biotechnology and medicine, especially for the production of antibiotics like penicillin.
Ascomycota includes both beneficial fungi, like those used in baking and brewing, and harmful fungi, like those causing plant diseases.
Deuteromycota
Deuteromycota, also known as Fungi Imperfecti, includes fungi that do not have a known sexual reproductive stage. This group was used as a 'catch-all' category for fungi that could not be classified in other phyla due to the lack of observed sexual reproduction.
  • Reproduce asexually through conidia.
  • Important in the decomposition of organic materials.
  • Some species are used to produce antibiotics, while others can cause diseases in plants and animals.
Modern classification methods, including DNA sequencing, have led to the reclassification of many Deuteromycota fungi into more appropriate phyla.
Basidiomycota
Basidiomycota is known for its club-shaped structure called a basidium, where sexual spores are produced. This phylum includes mushrooms, puffballs, and rusts. Basidiomycota can reproduce both sexually and asexually, but sexual reproduction is more common.
  • Sexual reproduction involves basidiospores formed on a basidium.
  • Asexual reproduction can involve conidia, but is less frequent.
  • Includes both edible fungi, like mushrooms, and plant pathogens, like rusts and smuts.
Basidiomycota is crucial for ecosystems as decomposers and symbiotic partners with plants (mycorrhiza).
Glomeromycota
Glomeromycota is a relatively small phylum, but it is ecologically important. It primarily includes fungi that form symbiotic relationships with plant roots, known as mycorrhizae. These symbiotic relationships are crucial for plant health and nutrient uptake.
  • Reproduce asexually through the formation of large spores.
  • No known sexual reproduction structures.
  • Form arbuscular mycorrhizae with plant roots, helping plants absorb water and nutrients.
Glomeromycota plays a vital role in agriculture and natural ecosystems by enhancing plant growth and soil health.

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Most popular questions from this chapter

What term describes the close association of a fungus with the root of a tree? a. a rhizoid b. a lichen c. a mycorrhiza d. an endophyte

A scientist discovers a new species of fungus that introduces genetic diversity during reproduction by creating a diploid zygote. This new species cannot belong to which modern phylum of fungi? a. Zygomycota b. Glomeromycota c. Chytridiomycota d. Deuteromycota

Why are fungal insecticides an attractive alternative to chemical pesticides for growing food crops? a. Human consumption of fungal insecticides would not make a person sick, but ingestion of chemical pesticides can be harmful to humans. b. A single fungal insecticide would kill a wider variety of insects than a chemical pesticide. c. Fungal insecticides can eliminate both harmful insects and plant pathogens, while chemical pesticides only kill insects. d. Fungal insecticides will decompose dying plants, enhancing the nitrogen content of the soil, while chemical pesticides are not decomposers.

Which of the following statements is true? a. A basidium is the fruiting body of a mushroom-producing fungus, and it forms four basidiocarps. b. The result of the plasmogamy step is four basidiospores. c. Karyogamy results directly in the formation of mycelia. d. A basidiocarp is the fruiting body of a mushroom-producing fungus.

Ambrosia bark beetles carry Ambrosiella fungal spores to trees, then bore holes and lay their eggs with the fungus. When the new larvae hatch, they eat the fungus that has germinated in the holes. Describe how this relationship can be classified as mutualistic.
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