Question

Which among the following characteristics belong to class Pisces?

• A. Both aquatic and terrestrial
• B. They lay eggs
• C. Streamlined body
• D. All of them are cartilaginous

Answer 1

Answer: (B), (C)

Streamlined body

Pisces includes all fishes. These are aquatic animals and are present in both freshwater and marine water. They have a streamlined body which allows them to move easily in water. They lay eggs (oviparous). Some fishes have skeleteon made entirely of cartilage (e.g. shark). On the other hand, some have cartilaginous skeleton in the embryonic stage, which is replaced by bones in the adult forms (e.g. rohu).