Concept:Both
Paramecium and
Amoeba are protozoans that use food vacuoles for digestion.
Explanation:Paramecium has two nuclei, two contractile vacuoles, and a gullet.
Amoeba usually has one nucleus, one or more contractile vacuoles, and no gullet.
Therefore, two nuclei, two contractile vacuoles, and one gullet are not shared by both.
During feeding, both organisms form food vacuoles where digestion occurs.
Thus, the common structural feature is the presence of food vacuoles.
Answer:A. one food vacuole