Question

Nirogenous excretory product of frog tadpole-
1. Urea
2. Ammonia
3. Uric acid
4. Protein

Answer 1

Correct Answer - Option 2 : Ammonia

Concept:

• Excretion is the process of removal of nitrogenous wastes from the body of an organism.
• Nitrogenous waste can be divided into three groups based on its toxicity.

1. Ammonia – animals secreting ammonia are called Ammoneotelic
2. Urea - animals secreting urea are called Ureotelic
3. Uric acid - animals secreting uric acid are called Uricotelic

 

Ammonia	Urea	Uric Acid
Highly toxic	Moderate toxic	Not very toxic
Highly soluble	Moderately soluble	Very less soluble
Excreted mainly by aquatic invertebrates, Osteichthyes(bony fishes and tadpole)	Excreted by Chondrichthyes (Sharks and rays), terrestrial amphibians and mammals	Excreted by insects, reptiles and all birds

 

Explanation:

• Ammonia is a water-soluble highly toxic nitrogenous waste, and it requires plenty of water for its removal
• Frog’s Tadpole is aquatic and lives in water so, nitrogenous wastes are eliminated in the form of ammonia.
• Adult frog has an amphibian habitat so it requires a lower amount of water for its waste removal, so the waste is removed in the form of Urea.