Mobile animal forms are derived from which of the following?

The protists used in the construction of soundproof rooms are . . . . . . .

Select the correct option for the following statements:
$(i)$ All protozoans are heterotrophs and live as predators or parasites.
$(ii)$ $Trypanosoma$ causes sleeping sickness.

Which of the following organisms resembles the ancestral form from which both animals and plants are believed to have evolved?

Which of the following kingdoms includes $Euglena$ and $Dinoflagellates$?

Dinoflagellates glow in the dark because-