Protista includes:

Which of the following organelles are associated with defence in protozoans?

$Entamoeba$ differs from $Amoeba$ in not having:

Suppose you accidentally find an old preserved permanent slide without a label. In your effort to identify it,you place the slide under a microscope and observe the following features:
$(a)$ Unicellular
$(b)$ Well-defined nucleus
$(c)$ Biflagellate - one flagellum lying longitudinally and the other transversely.
What would you identify it as? Can you name the kingdom it belongs to?

The function of the contractile vacuole in $Amoeba$ is

Mobile animal forms are derived from which of the following?