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Chapter 26: Problem 7

Name the structure that makes up the body of a fungus.

Short Answer

Expert verified
The structure that makes up the body of a fungus is the mycelium.

Step by step solution

01

Identify the Basic Unit of a Fungus

Fungi are composed of a network of thread-like structures known as hyphae. These hyphae form the basic structural units of a fungus.
02

Understand the Collective Structure

When many hyphae intertwine and grow together, they form a mass. This structure is referred to as the mycelium.

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Key Concepts

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

Hyphae
The fundamental building blocks of fungi are their individual thread-like structures, known as hyphae. Each hypha is a long, tubular cell or series of cells that function like tiny roots in the soil.
Hyphae extend to absorb nutrients from the environment, facilitating the fungus's ability to digest and decompose organic material. These structures are critical for fungal growth and reproduction, as they allow fungi to spread over large areas and gain access to the resources they need to thrive. Hyphae have porous walls, allowing the movement of cytoplasm and nutrients within the network.

  • They are typically just a few micrometers in diameter.
  • Hyphae can grow rapidly, sometimes expanding over 1km in just a day.
  • Some hyphae have partitions called septa that divide the cells, while others are continuous tubes full of cytoplasm.
Mycelium
When hyphae branch out and intertwine with each other, they form a complex and dense network called mycelium. This web-like network is the main body of a fungus.
Mycelium acts as an underground nutrient network, absorbing nutrients through enzymatic breakdown of organic material in the environment. Often unseen, mycelium can stretch over vast areas, sometimes covering hundreds of acres underground.
It is essential not only for the survival of the fungus but also for ecological balance, as it plays a critical role in decomposing organic matter.
  • Mycelium helps in forming new spores for reproduction.
  • It enables fungi to break down complex organic substances into simpler compounds.
  • Mycelium networks are sometimes visible as a white furry growth beneath dead leaves or fallen branches.
Fungi
Fungi are a diverse group of organisms, which include molds, yeasts, and mushrooms. Unlike plants, fungi do not produce their own food through photosynthesis; instead, they rely on absorbing nutrients from their surroundings.
This is achieved thanks to the extensive networks of hyphae and mycelium. Fungi play a crucial role in the ecosystem by recycling nutrients through the decomposition of organic matter. They also form symbiotic relationships with plants and animals. Some fungi provide medicinal benefits, such as antibiotics and other pharmaceuticals, while others are used in food production like bread, beer, and cheese.

  • Fungi reproduce through spores, which can be spread over large distances by wind, water, or animals.
  • Unlike animal cells, fungal cell walls are made of chitin, not cellulose like in plants.
  • The study of fungi, known as mycology, helps us understand their importance in nature and potential benefits to humanity.

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Most popular questions from this chapter

For each pair of terms, explain how the meanings of the terms differ. a. hypha and mycelium b. septate hyphae and coenocytic hyphae c. basidiocarp and ascocarp d. mycorrhiza and mycelium

Use the following terms to create a concept map that shows the sequence of events in the formation of an ascocarp and that begins with a germinating ascospore: ascocarp, ascogonium, asci, tube, ascospores, meiosis, antheridium, and mitosis.

The word gametangium comes from two Greek words: gamete, meaning "spouse," and angeion, meaning "case" or "capsule." Using this information, explain why gametangium is a suitable term for what happens when two different mating types of fungal filaments meet.

A folk remedy for the treatment of an infected wound calls for a piece of moistened, moldy bread to be placed on the wound. How might this practice help a wound to heal?

What advantages might a fungal spore have over a seed?
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