Question

A current of water is produced in Branchiostoma by

• A. Cilia
• B. Cirri
• C. Wheel organ
• D. Rostrum

Answer 1

The correct option is B Cirri

Branchiostoma generates water currents to aid in ingestion of food.

A) Cilia are short hair- like structures absent in Branchiostoma.

B) Cirri or buccal cirri are filament-like appendages present in the form of a ring around the mouth which generate water currents for ingestion of food.

C) Wheel organ is located in the buccal cavity of branchiostomes. It does not generate water currents.

D) Beak or snout is referred to as rostrum. Branchiostoma does not produce water currents by rostrum.

So, the correct answer is 'Cirri'.