You isolate a cell with the following characteristics: (1) no nucleus, (2) a cell wall, and the cell is (3) 2 μm in size. This cell could be a/an:

• A. Bacterium.
• B. Plant cell.
• C. Animal cell.
• D. Bacterial cell or a plant cell.
• E. Plant cell or an animal cell.

Answer: (A)

Verified step by step guidance

1. Identify the characteristics of the cell: no nucleus, a cell wall, and a size of 2 μm.
2. Recall that eukaryotic cells, such as plant and animal cells, have a nucleus, whereas prokaryotic cells, like bacteria, do not.
3. Consider the presence of a cell wall. Both plant cells and bacterial cells have cell walls, but animal cells do not.
4. Evaluate the size of the cell. Bacterial cells are typically around 1-10 μm, while plant and animal cells are generally larger.
5. Based on the absence of a nucleus, presence of a cell wall, and small size, conclude that the cell is most likely a bacterium.