Muscular tail, streamlined body shape, scaly skin, and two-chambered heart are the characteristic features of class _______.

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Solution

Class Pisces:
The class Pisces includes truly jawed vertebrates.
They include freshwater or marine fishes. Their body is streamlined and divided into a head, trunk, and tail.
They swim with the help of a tail and their body is covered with thick scales that provide protection.
They have gills to conduct respiration and have a closed blood circulation system.
Final answer: Muscular tail, streamlined body shape, scaly skin, and two-chambered heart are the characteristic features of class Pisces.

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