The causal organism for African sleeping sickness is

Saprophytic protists having an aggregation called $plasmodium$ are $:-$

What observable features in Trypanosoma would make you classify it under Kingdom Protista?

"Kieselguhr" (diatomaceous earth), which is a heat-resistant substance, is obtained from which of the following?

Amoeba stops producing pseudopodia during

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?