Question

A mycorrhizal-associated fungus grows between cells of the root of a plant, forming a mantle around the exterior of the root. This is an example of a(n) _______ association.

1) arbuscular mycorrhizal
2) communalistic mycorrhizal
3) ectomycorrhizal
4) endomycorrhizal

Answer 1

A fungus that forms a mantle around a plant's root and grows between cells without penetrating them signifies an ectomycorrhizal association.

Step-by-step explanation:

A mycorrhizal-associated fungus that grows between the cells of the root of a plant and forms a mantle around the exterior of the root is an example of a ectomycorrhizal association. Unlike endomycorrhizae, or arbuscular mycorrhizae, which involve the fungal hyphae penetrating the plant root cells, ectomycorrhizae are characterized by fungi enveloping the roots in a mantle and extending a network between the root cells without entering the cells themselves. This mutually beneficial relationship allows the fungi to receive glucose from the plant, while in return, it extends the root's capability to absorb water and nutrients thanks to the fungus's extensive mycelial network.