5 Marks Questions

Question

How are pisces different from tetrapoda?

Vidyadip · Accepted Answer

Differences between pisces and tetrapoda are given below:

S.No.	Pisces	Tetrapoda
1.	They have exoskeleton of dermal scales	They have an exoskeleton of epidermal scales, feathers or hair.
2.	They have two-chambered heart (1 auricle, 1 ventricle) in most cases.	They have three or four chambered heart (2 auricles, 1 or 2 ventricles).
3.	Pisces breathe with gills.	Breathe with lungs except some amphibians.
4.	They have internal ear only.	They have external and middle ear, besides internal ear, in most cases.
5.	They are aquatic.	They are terrestrial, some have secondarily became aquatic.
6.	The lateral line sense organs are well-developed.	The lateral line sense organs are absent, except a few larval amphibians.
7.	They are poikilothermic.	Some are poikilothermic and some are homeotherms.
8.	They have 10 pairs of cranial nerves.	They have 10-12 pairs of cranial nerves

Answer