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Chapter 22: Problem 6

The mycelium of a multicelled fungus is a mesh of filaments, each called a ________.

Short Answer

Expert verified
Each filament in a mycelium is called a hypha.

Step by step solution

01

Identify the Structure

The mycelium is part of a fungus. It is a network of thread-like structures that spread out to absorb nutrients from the environment.
02

Name the Main Component

Each of the thread-like structures in the mycelium network is known as a hypha. Hyphae are the individual filaments that make up the mycelium.
03

Place the Term in the Sentence

The correct term for each filament is 'hypha'. So, in the sentence 'The mycelium of a multicelled fungus is a mesh of filaments, each called a', the missing word is 'hypha.'

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Key Concepts

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

Hyphae
Hyphae are the building blocks of a fungus's mycelium, essentially acting as the roots of a fungus.
These are long, thread-like structures that extend and spread into their surroundings.
Think of them as tiny spaghetti strands that grow outwards from the main body of the fungus, seeking new territories.

  • Hyphae grow by extending at their tips, allowing the fungus to explore and invade new areas efficiently.
  • They are important for nutrient absorption, as they absorb nutrients directly from the environment to feed the fungus.
  • Through a network of hyphae, fungi can cover large areas, increasing their surface area and access to resources.

Overall, hyphae increase the reach of a fungus, making it highly adaptable and resourceful in various environments.
Multicellular Fungi
Fungi are fascinating organisms that come in different forms, with multicellular fungi being one of the most complex.
Unlike single-celled fungi like yeasts, multicellular fungi are made up of many cells, often organized into intricate structures.

Multicellular fungi include molds and mushrooms, which are more than just simple growths.
Their structures are designed for various functions, such as reproductive spore production or nutrient absorption.

  • The mycelium of these fungi consists of numerous hyphae, creating a dense network underground.
  • This network can be quite extensive, with some mycelium stretching over large areas, sometimes hundreds of acres.
  • Such organization allows the fungi to efficiently break down complex organic substances, like fallen leaves or wood, facilitating nutrient cycling in ecosystems.
Nutrient Absorption
Nutrient absorption is vital for the survival of fungi, as it allows them to obtain the necessary elements for growth and reproduction.
Fungi, especially those that are multicellular, have adapted unique methods to optimize nutrient intake.

Through their network of hyphae, they come into contact with their substrate, which could be soil, decaying matter, or other organic material.

  • Fungi secrete enzymes that break down complex nutrients in their environment into simpler, absorbable molecules.
  • The main sites of nutrient absorption are the tips of the hyphae, which have high surface areas to maximize absorption.
  • This passive absorption process is enhanced by the large collective surface area of the mycelium network.

By decomposing organic material, fungi play a crucial role in recycling nutrients back into the ecosystem, supporting plant growth and maintaining ecological balance.

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Most popular questions from this chapter

Nitrogen-fixing cyanobacteria often interact with a fungus as a ____________. a. mycelium b. lichen c. mycorrhiza d. mycosis

Saprobic fungi obtain nutrients from ____________. a. nonliving organic matter b. living plants c. living animals d. both b and c

A mushroom is ___________. a. the digestive organ of a club fungus b. the only part of the fungal body made of hyphae c. a reproductive structure that releases sexual spores d. the only diploid phase in the club fungus life cycle

Spores released from a mushroom's gills are _____________. a. diploid b. haploid c. dikaryotic

____________ are fungi that produce flagellated spores. a. Chytrids b. Sac fungi c. Zygote fungi d. Club fungi
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