List three characteristics which help us to distinguish amphibians from pisces. Classify the following living organisms as cold-blooded and warm- blooded animals: Shark, Lizard, Sparrow, Rohu

[AmarCBSE]

1. List three characteristics which help us to distinguish amphibians from pisces.
2. Classify the following living organisms as cold-blooded and warm- blooded animals:
   Shark, Lizard, Sparrow, Rohu.

Answer:

1. Following characteristics distinguish amphibians from pisces:

• Amphibians lack scales whereas skin of pisces are covered with scales.
• Amphibians have mucous glands.
• Amphibians have a three-chambered heart unlike pisces, their hearts have only two chambers.

2. Cold-blooded: Shark, Rohu, Lizard
   Warm-blooded: Sparrow