Question

Chaos is also known as
a) Yellow amoeba
b) Giant amoeba
c) Parasite amoeba
d) None of the above

Answer 1

Amoeba is a unicellular organism. It changes its shape and size for motility and for grasping food. Its extended structure is called pseudopodia. They help in the grasping of the food materials. They live in freshwater, ponds, and pools. They are free-living or sometimes parasitic in nature.

Complete answer:
Chaos is a single-celled amoeboid. It belongs to the family of amoebidae. They are the largest and the best-known species and are known as giant amoeba. They are of size 5nm but most of the species fall between the size of 1nm -3 nm. They are heterotrophic in nature and feed on the bacteria, algae, and Protists. They have the same food taking mechanism as the other amoeba. They use pseudopodia for the engulfing and capturing of food. This process is known as phagocytosis. They resemble members of the genus Amoeba as they have the same morphology and practice phagocytosis.

Additional information: Parasitic amoeba are harmful amoeba as they need a host body for their development and nutrition hence, causing diseases in the host body. Entamoeba histolytica is the amoeba that causes the disease amoebiasis. It is also known as amoebic dysentery. This disease can be caused by any species of the Entamoeba group. The parasite needs a human host for completion of its life cycle. The symptoms may vary from mild to severe in some cases. Some of the common symptoms found are abdominal pain, diarrhea, and inflammation of the colon, and tissue death in severe conditions.
So, the answer is ‘b) Giant amoeba’.

Note: Free-living amoeba is Amoeba proteus. It is non-pathogenic in nature and is of size 2nm. The parasitic or opportunistic amoeba causes the disease amoebiasis. It is caused by the ingestion of the cyst through infected food and water. Amoeba can be brain-eating like Naegleria fowleri. They are present in the hot springs, lakes, and rivers.