In the domain Eukarya, fungi can exist in which cellular organization?

• A. They are always multicellular and never occur as single cells.
• B. They are always unicellular and never form multicellular structures.
• C. They are acellular and exist only as infectious particles.
• D. They can be unicellular (e.g., yeasts) or multicellular (e.g., molds and mushrooms).

Answer: (D)

Verified step by step guidance

1. Understand the domain Eukarya, which includes organisms with complex cells containing a nucleus and membrane-bound organelles.
2. Recognize that fungi are a kingdom within Eukarya and exhibit diverse cellular organizations.
3. Identify that some fungi are unicellular, such as yeasts, which exist as single cells.
4. Note that other fungi are multicellular, such as molds and mushrooms, which form complex structures made of hyphae.
5. Conclude that fungi can exist both as unicellular and multicellular organisms, depending on the species and life stage.