Kingdom Protista

Marine forms

________ have silica shells on their surface.

protozoans

All ________ are heterotrophs and live as predators or parasites.

Protists

________ reproduce asexually and sexually by a process involving cell fusion and zygote formation.

diverse organisms

It includes ________ that have an infectious spore- like stage in their life cycle.

eukaryotes

Being ________, the protistan cell body contains a well defined nucleus and other membrane- bound organelles.

primitive relatives of animals

They are believed to be ________.

cell wall

Instead of a(n) ________, they have a protein rich layer called pellicle which makes their body flexible.

pigments of euglenoids

The ________ are identical to those present in higher plants.

cell walls

The ________ form two thin overlapping shells, which fit together as in a soap box.

cell wall

The ________ has stiff cellulose plates on the outer surface.

Characteristics of members of Kingdom Protista

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Examples

Diatoms and Golden Algae (Desmids)

Most of them have two flagella

one lies longitudinally and the other transversely in a furrow between the wall plates

Example

Gonyaulax (red dinoflagellate)