Question

Identify the protozoan with anematic flagellum:

• A. Chilomonas & Cryptomonas
• B. Euglena & Astasia
• C. Peranema & Monas
• D. Chlamydomonas & Politoma

Hint:

Anematic flagella = smooth (non-tinsel). Chilomonas and Cryptomonas fit this category.

Answer 1

The Correct Option is A

- Anematic flagellum refers to a non-contractile, non-tinsel flagellum type.
- Both \textit{Chilomonas} and \textit{Cryptomonas} are flagellated protozoans with anematic (smooth) flagella used for locomotion.
- Other options either don’t have anematic flagella or have tinsel-type flagella (bearing hairs or mastigonemes).

Answer 2

The protozoans that possess an anematic flagellum are Chilomonas and Cryptomonas.

An anematic flagellum refers to a type of flagellum that lacks the typical whipping or beating motion seen in many motile protozoans. Instead, it is often stiff or non-motile, serving different functions such as sensory roles or aiding in feeding rather than propulsion.

Chilomonas and Cryptomonas are both genera of flagellated protozoans belonging to the group known as cryptomonads. They exhibit distinct flagellar structures; among them, the anematic flagellum plays a role in their cellular function.

These protozoans are important in aquatic ecosystems, often contributing to the microbial food web by feeding on bacteria and small particles. Their unique flagellar characteristics help in their adaptation to their environment.

Thus, the presence of an anematic flagellum is a key feature in identifying Chilomonas and Cryptomonas among protozoans.