Question

explain features defining the sub-phyla of phylum protozoa

Answer 1

Explanation:

The animals included in phylum Protozoa can be defined as microscopic and acellular animalcules without tissues and organs. ... Protozoa exist either singly or in colonies. Almost about 50,000 species are known till date. Anton Van Leeuwenhoek was the first to observe protozoa (Vorticella convellaria) under a microscope.