How are Protozoa classified?

Question

are they classified by their cell wall, their nucleus, their rRNA sequencing, or their DNA?

Answer 1

Taxonomists classify Protozoa according to what loco motor organelles these animals have.
Sarcodina have pseudopodia of different shapes.
Mastigophora have flagella of different sizes and number.
Euciliates have cilia of different shapes and number.
Sporozoa too have pseudopodia but since they are parasitic, they are carried from one host to another.
There is no need to do sequencing of rRNA and DNA unless one has to find out differences in various strains.

Answer 2

Protozoan classification
Four major groups of protozoa are recognised and often given the status of phylum* . Note, however, that in the animal kingdom proper (Metazoa* ), phyla are distinguished on their different body plans and that no comparable body plans are found in Protozoa.

The groups are:



Flagellates (or Mastigophora)
Amoebae (or Sarcodina)
Sporozoans (or Sporozoa, Apicomplexa) and
Ciliates (or Ciliophora).
The above classification represents a convenient filing system. We now know from molecular data (especially RIBOSOMAL RNA gene sequencing), that the different groups of flagellates and amoebae are not closely related and that there may be much greater genetic distance between two groups of flagellates than between flowering plants and vertebrates.

The above classification is not therefore phylogenetic* (i.e. reflecting the course of evolution). It is at present premature to try to construct a phylogenetic classification of protists, and for purposes of identification the above traditional classification is a starting point.

Answer 3

Protozoan Classification

Answer 4

As a single cell organism with no pseudopods.

Answer 5

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Answer 6

protozoa are classifeied based on their locomotory organelles and their mode of nutriton

Answer 7

AMITOCHONDRIATE EUKARYOTES