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Q.
Protozoans are not included in kingdom Animalia because -
Biological Classification
Solution:
The Protozoa are a diverse group of unicellular eukaryotic organisms. Protozoa, as traditionally defined, are mainly microscopic organisms, ranging in size from 10 to 52 micrometers. Some, however, are significantly larger. Among the largest are the deep-sea dwelling xenophyophores, single-celled foraminifera, whose shells can reach 20 cm in diameter.