Question

In a torpedo or electric ray the electric organ is modified
A. Nerve nets
B. Cartilage complexes
C. Branchial muscles
D. Respiratory centers

Answer 1

Hint: Electric ray also called torpedo fish, number fish, or cramp fish which can produce electric shocks. They belong to the families Torpedinidae, Narkidae, Narcinidae, and Hypnidae.

Complete answer:
In this specific question, we should know that electric rays (Torpedo torpedo) are flattened cartilaginous fish with enlarged pectoral fins.

Order – Torpediniformes
Family- Torpedinidae
Genus- Torpedinidae
Species- torpedo
They are capable of producing an electric discharge of 8 to 220 volts. The electrogenic properties of these fishes have been known since antiquity. To create numbness of the pain during childbirth the ancient Greeks had used these electric rays. They are found in shallow coastal waters to 1000 Deep. They feed on invertebrates and small fishes. The electric ray may be considered the most electro sensitive of all other animals. Their eyes are on the top of their heads, which results in having poor vision, and electric senses are used to compensate for poor vision. Electric rays are having two kidney-shaped electric organs in a disc on each side of the head. These types of an organ can generate strong electric shocks. These electric organs are derived from branchial muscles. A system of interconnected neurons that may be defined as a nervous system is called a nerve net. There are about 60 species of electric ray fish and about 12 genera and only two families. Torpedo uses its electric stings for many purposes like defense, attack, and catching prey for food.
Cartilage complexes are the arrangement of cartilage which is a kind of structural component of the body.

Hence, the correct answer is option (C)

Note: Electric rays (Torpedo torpedo) are flattened cartilaginous fish with enlarged pectoral fins. These electric organs are derived from branchial muscles. A system of interconnected neurons that may be defined as a nervous system is called a nerve net. There are about 60 species of electric ray fish and about 12 genera and only two families.