Final answer:
All fungi are not unicellular; while yeasts are unicellular, many fungi are multicellular, with structures such as hyphae and mycelium. The fungal cell wall, containing chitin, is essential for cell stability and protection.
Step-by-step explanation:
Are All Fungi Unicellular?
The statement that all fungi are unicellular is false. Fungi are eukaryotic organisms with cell walls made of chitin. While there are unicellular fungi, such as yeasts, many fungi are multicellular. For example, mushroom-forming fungi consist of vast networks of filamentous structures known as hyphae, which come together to form a mycelium. The fruiting bodies we commonly recognize as mushrooms are just a part of the organism. Moreover, the cell wall of fungi provides several functions: it gives structural stability to the cell, protects from environmental stresses, and contains chitin which adds rigidity and strength.