What is the composition of rhizomorphs?

Rhizomorphs are specialized structures formed by fungi, typically composed of a dense network of hyphae, which are the thread-like filaments that make up the mycelium of fungi. These collections of hyphae are organized in a way that allows them to serve various functions, such as nutrient absorption and the transport of water and nutrients over long distances.

The structural composition of rhizomorphs enables them to act similarly to roots in plants, helping fungi to efficiently reach resources in their environment. In environments where nutrients are scarce, rhizomorphs can spread out and explore wider areas in search of food sources. This adaptation plays a critical role in the life cycle of fungi and their interactions within ecosystems.

The other options incorrectly describe the nature of rhizomorphs, as they are not single-celled organisms, spores, or parts of plant root systems. Instead, they are multicellular structures specifically related to the mycelial network of fungi.