$Entamoeba \text{ } gingivalis$ is found in the buccal cavity of humans. It causes:

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.

The accumulated dead remains of diatoms are known as ............

Paramecium moves about by

Which of the following statements is a characteristic feature of chrysophytes?

In which group of organisms does the cell wall form two thin overlapping shells that fit together?