Question

Slipper animalcule/ Slipper organism is
A. Paramecium
B. Euglena
C. Plasmodium
D. Monocystis

Answer 1

Hint: The movement of lower class organisms depends on the structures present on their body. These hairs like structures are called cilia and flagella. Paramecium contains thousands of hairs on their body. Euglena and plasmodium do not contain cilia on their body.

Complete answer:
-Paramecium is a unicellular organism. The size of the paramecium ranges from 50 to 300um which varies from species to species. The paramecium caudatum has many short vibrating hairs, or cilia, on the outside of its cell. It has several thousands of cilia on its body.
Paramecium have slipper like shape that’s why they are called as slipper animalcule or slipper organisms. They mostly feed on bacteria, which are driven into the gullet through the oral cavity by the cilia.
-Euglena does not contain many cilia on its body. It only has two flagella.
-Plasmodium is known as the eukaryotic parasites. They infect many vertebrates and cause malaria also. They lack flagella and cilia or the amoeboid cell movements. These structures are responsible for movement of many eukaryotic cells.
-The monocystis belongs to the sporozoa. It is present in seminal vesicles of the earthworm. It is characterized by no cilia or flagella. It lacks locomotory organs in the adult stage.

Hence, the correct answer is option (A).

Note: Paramecium is found in aquatic habitats. Paramecium can also be cultured in labs and serve as useful model organisms. These are elongated organisms. They are divided into two groups: aurelia and bursaria based on the cell shape. They are a part of a group of organisms known as ciliates. Movement of cilia depends on the paramecia. It can move forward with the rate of the 2mm per second.