Question

The caudal fin of a fish and in a pigeon is useful to -------.
A. Increase the velocity
B. Decrease the velocity
C. Change direction
D. Maintain balance

Answer 1

Hint: Fish and Pigeon belong to the animal kingdom in phylum Chordata. Pigeon belongs to class Aves. Fishes belong to superclass Pisces. Pigeon bear limbs so belong to superclass tetrapoda.

Complete step by step answer: 1. The caudal fin is also known as the tail fin it is used in birds and fishes.
2. The caudal fin in fish and pigeon is used to increase the velocity of them.
3. The caudal fin has two main roles. The first role is that the caudal fish is responsible for the forward movement of the fish. In second it increases the velocity while moving.
4. Caudal fin is located at the tail area of the fish after the caudal peduncle.
So, the correct answer is ( A )
Some additional information :
1. Fishes are characterized by gills.
2. Chondrichthyes is also a class of fish and Osteichthyes is also a class of fish.
3. Chondrichthyes have notochord persistence throughout life.
4. Chondrichthyes are Marine animals that streamlined bodies and have a cartilaginous endoskeleton.
5. Due to the absence of an air bladder Chondrichthyes have to swim constantly to avoid sinking
6. Osteichthyes include both Marine and freshwater fishes and have a bony endoskeleton.
7. Their bodies are streamlined and their mouths are mostly terminal.
8. Air bladder is present which regulates buoyancy. So they do not need to swim continuously

Note: Gills are without gill cover or operculum in Chondrichthyes and Gills are covered by gill
cover or operculum in Osteichthyes. This is one of the important differences between them.