Question

Why cannot a frog kept in the class of pisces? Give reason.

Answer 1

Answer:

frog can live in water only in larval time after it will live in terrestrial

psices have only gills and tails but frog has lungs, gills and not have tail

Answer 2

Answer:

The frog belongs to the class amphibia, which live both on water and land.

Explanation:

• Frogs spend part of their lives underwater and part on land.  Frogs must keep their skin moist by periodically returning to wet areas.

• The characteristic features of frog are:

• Being tetrapods (4 limbs) that facilitate moving about on land - these limbs evolved from the pectoral and pelvic fins.

• Skin is thin, soft, glandular and magid (lack scales except in the caecilians) - a skin of caecilians with scales similar to those of fish.

• Ectothermic.

• Both gill and lung breathers - usual gills in the larval stage, replaced by lungs in the adult; cutaneous respiration in many.

• Three-chambered heart with two atria and one ventricle.
• Fishes are aquatic; cold-blooded vertebrates. Their body is divisible into a head, trunk and tail. The neck is absent. It has a spindle-shaped body. It is helpful in swimming. The body is covered by scales and respiration is by gills.