Osmoregulation in $Paramecium$ is a function of . . . . . .

Paramecium is

Which of the following is a slime mould?

Which of the following are the characters of dinoflagellates?
$(i)$ They are planktonic golden yellow algae with soap box like structure.
$(ii)$ They are marine biflagellated protista.
$(iii)$ They appear yellow,green,brown,blue and red in colour.
$(iv)$ The cell wall has stiff cellulose plates on the outer surface.
$(v)$ They are saprophytic (or) parasitic unicellular forms.

The flagellum of $Astasia$ or $Euglena$ is:

Characteristic spores of diatoms are