Zoology - Fishes

Front

What type of scales do sharks possess?

Back

Sharks have placoid scales, which are small, tooth-like structures that provide protection and reduce drag in the water.

Front

What is the function of the counter-current system in fish gills?

Back

The counter-current system in fish gills ensures that the concentration gradient of oxygen is maintained, allowing for efficient gas exchange.

Front

Which group of fish is known as bony fish?

Back

The group of bony fish is called Osteichthyes, characterized by a skeleton made of bone.

Front

What organ do sharks use to maintain buoyancy?

Back

Sharks use a large, oil-producing liver to increase buoyancy.

Front

What is the role of spiracles in the respiratory system of insects?

Back

Spiracles allow air to enter the insect's body for respiration.

Front

What are the main differences between Chondrichthyes and Osteichthyes?

Back

Chondrichthyes are cartilaginous fish (like sharks and rays), while Osteichthyes are bony fish with a skeleton made of bone.

Front

How do fish regulate their buoyancy?

Back

Fish regulate buoyancy primarily through swim bladders (in bony fish) or oil-filled livers (in sharks).

Front

What is the significance of gill rakers in fish?

Back

Gill rakers are structures that help filter food particles from water as it passes over the gills.

Front

What adaptations do fish have for life in water?

Back

Fish have streamlined bodies, gills for breathing, fins for movement, and scales for protection.

Front

What is the primary function of fish fins?

Back

Fish fins are primarily used for locomotion, stability, and maneuverability in the water.