The structure of the fungus that is involved directly in the formation of a lichen thallus is the
A) ascoma.
B) mycelium.
C) spore.
D) ascus.
E) cyanobacterium.

Question

Quizplus · Accepted Answer

The fungus involved in the formation of a lichen thallus is the mycelium, which is the vegetative part of the fungus that grows into the lichen structure and provides structural support, nutrients, and protection. The cyanobacterium or alga is typically embedded in the mycelium and provides photosynthetic ability to the lichen. Ascomata, ascospores, and ascus are reproductive structures produced by some lichen-forming fungi but are not directly involved in the formation of the thallus.

The Structure of the Fungus That Is Involved Directly in the Formation