A cell was studied under an electron microscope. The following features were observed in the cell: 
1. No membrane-bound organelles 
2. Absence of nucleus 
3. Presence of 70S ribosomes in the cytoplasm 
Based on the above features, the cell under investigation was probably 

• A. A prokaryotic cell
• B. A fungal cell
• C. A plant cell
• D. An animal cell

Answer: (A)