Both can conjugate. Neither can conjugate. An amoeba can conjugate, but a paramecium cannot. A paramecium can conjugate, but an amoeba cannot.
I gave my students this multiple choice question: Which is true about reproduction for both an amoeba and a paramecium?

Only one answer is correct among these 4 choices:
- Both can conjugate.
- Neither can conjugate.
- An amoeba can conjugate, but a paramecium cannot.
- A paramecium can conjugate, but an amoeba cannot.

Could you tell me which one is correct?

A paramecium can conjugate, but an amoeba cannot.