Question

Lateral line sensory system is markedly developed in

• A. Scoliodon.
• B. Cyclostomes, fish and a few larval amphibians.
• C. Larval stages of fishes.
• D. All members of class Elasmobranchii.

Answer 1

Answer: (B)

Cyclostomes, fish and a few larval amphibians.

The proper nervous system development mainly takes places in a complex organism like chordates.

The Amphibians are characterized by a system of tactile sense organs, unique to aquatic vertebrates from cyclostome fishes, like lampreys and hagfish to amphibians, that serves to detect movements and pressure changes in the surrounding water.

So, the correct answer is option B.