Paramecium is

In which forms are Protista visible?

Two species of Amoeba $X$ and $Y$ were kept in fresh water and adapted to it. Species $X$ developed a contractile vacuole. When both were transferred to sea water and adapted,both $X$ and $Y$ lost their contractile vacuole. From these observations,we conclude that:

The function of the contractile vacuole in $Amoeba$ is

Pseudopodia is a characteristic feature of which class?

Which kingdom includes unicellular or multicellular eukaryotic organisms?