Question

Why are biologists still debating the classification of protozoans?

Answer 1

Ans :

Because the biologists are continuing to learn more and more about such minute organisms, protozoan systematics – that is, the taxonomy (classification) and the evolutionary interrelationships of major groups of protozoa – remains a topic of debate and change, still today.

Answer 2

Because,protozoa comes in the kingdom protists whose boundaries are not well defined.i.e. some of the organisms of this kingdom are plants and some are animals.