In the five kingdom classification,which kingdom occupies an intermediate position from a phylogenetic point of view?

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

Protists are

Give scientific reasons: Diatoms are called the pearls of the ocean.

Reproduction in $Paramecium$ is controlled by

Which organism is considered a connecting link between plants and animals?