Protozoa Archives | Microbe Notes

Protozoa- Definition, characteristics, classification, examples

March 8, 2020December 18, 2019 by Laxmi Neupane

Protozoa Definition Protozoa may be defined as “microscopic acellular animalcules existing singly or in colonies, without tissue and organs, having one or more nuclei”. Some of the characteristics are: There are about 50,000 known species of Phylum Protozoa. Protozoans exhibit mainly two forms of life; free-living (aquatic, freshwater, seawater) and parasitic (ectoparasites or endoparasites). They are also commensal in habitat. …

Classification of Phylum Protozoa

January 2, 2020June 21, 2019 by Sagar Aryal

Classification of Phylum Protozoa Phylum protozoa is a large and varied group and possess a complication in its classification. The conventional scheme followed by Hyman (1940), Hickman (1961) and Storer (1965) etc. recognizes two subphyla on the basis of organs of locomotion and 5 classes as follows: Sub Phylum A: Plasmodroma Locomotory organelles are flagella, pseudopodia, or none. Nuclei is …

Characteristics of Invertebrates with examples

February 25, 2020June 21, 2019 by Sagar Aryal

Habitat They are found in seas, freshwater, air, land from snow to desert. 80% are found in terrestrial habitat. Most successful invertebrates of the lands are Arthropods. Protozoans are free-living, parasites or commensals. Sponges and Coelenterates are aquatic animals. Numerical Strength Among 1.25 million animal species, 95% (1.2 million) are invertebrates. Among 1.2 million invertebrates, 1 million are Arthropods. Shape …