$Ceratium$ is

The transverse groove present in dinoflagellates is:

Which group of protozoans consists entirely of parasites?

Which of the following is a slime mould?

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

The thalloid body of a slime mold is called: