In which group of organisms do the cell walls form two thin overlapping shells that fit together?

In which kingdom did Whittaker place the dinoflagellates?

Which of the following is not a characteristic of the phylum Protozoa?

Which of the following organisms possesses cilia?

Which of the following organisms is included in the kingdom $Protista$?

Statement $X$: Presence of a rigid cell wall and nucleoprotein as genetic material.
Statement $Y$: Examples include $Euglena$,$Dinoflagellates$,$Amoeba$,and $Paramecium$.