In which kingdom did Whittaker place the dinoflagellates?

The main cause of water blooms observed in rivers,lakes,and seas is .......

Which of the following organisms exhibits holophytic (plant-like) nutrition?

Which of the following organisms are simple,predominantly aquatic,unicellular,and eukaryotic?

By what process do organisms of the phylum Protozoa exhibit sexual reproduction?

Select the correct option for the following statements:
$(i)$ The sea appears red or golden when red dinoflagellates multiply rapidly.
$(ii)$ $Euglena$ / $Slime$ $molds$ are saprophytic protists.