Question

How are protozoans differentiated by means of their locomotary organelles ?

Answer 1

Locomotion in protozoans can be performed with the help of pseudopods, cilia, or flagella, and presence of either of these structures determines the specific group. Protozoans with pseudopods are called Sarcodina, and include Amoeba. Protozoans, which use cilia are Ciliates, such as paramecium. Protozoans with flagella are mastigophores, such as trypanosoma. The number and position of flagella can be used for further differentiation within group.
Some protozoans do not have special locomotion structures. They are called Sporozoa, and include plasmodium.