4. A single-celled organism that a student observed under a microscope is shown below.
Which of the following statements best describes this organism?
A. The organism is eukaryotic because it has a plasma membrane.
B. The organism is prokaryotic because it can reproduce asexually.
C. The organism is prokaryotic because it can synthesize its own food.
D. The organism is eukaryotic because it has membrane-bound organelles.