Filamentous fungi are generally which in cellular organization?

• A. Multicellular
• B. Unicellular
• C. Aerial-only
• D. Lacks nuclei

Answer: (A)

Filamentous fungi grow as networks of long, threadlike cells called hyphae that together form a mycelium. This web of many hyphae constitutes multiple cellular units arranged in a connected body, which is the hallmark of multicellular organization. Some hyphae have partitions (septa) between cells, while others are coenocytic with many nuclei in one continuous cytoplasm; in either case, the organism is built from numerous cellular elements rather than a single cell. While these fungi can produce aerial reproductive structures, their vegetative body—the mycelium—lollows a multicellular, networked organization. That’s why multicellular is the best fit.