Question

why Protozoa are regard as early animals?​

Answer 1

Protozoans are regarded as early or primitive animals because they exhibit a cellular level of organization, they live as parasites and move with the help of flagella or cilia, and they are microscopic and exhibit a primitive mode of reproduction (fission, budding or conjugation

Answer 2

Protozoa are regarded as early or primitive animals because:

1. they exhibit a cellular level of organisation;

2. the tissue, organs and systems have not developed in them;

3. they are microscopic and exhibit a primitive mode of reproduction.

hope it will help you....