The following substances are the excretory products in animals. Choose the least toxic form among them.

1. Urea

2. Uric acid

3. Ammonia

4. Carbon dioxide

Subtopic:  Nitrogenous Excretory Products |
 86%
Level 1: 80%+
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NEET 2026 - Target Batch - Vital
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Different types of excretory structures and animals are given below. Match them appropriately and mark the correct answer from among those given below

Excretory Structure/Organ Animals
A. Protonephridia 1. Prawn
B. Nephridia 2. Cockroach 
C. Malpighain tubules 3. Earthworm
D. Green gland or antennal gland  4. Flatworms 

Codes
 

A B C D
1. 4 3 2 1
2. 2 3 1 2
3. 4 3 1 2
4. 2 3 2 4

 

Subtopic:  Nitrogenous Excretory Products |
 93%
Level 1: 80%+
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Which one of the following statements is incorrect?

1. Birds and land snails are uricotelic animals
2. Mammals and frogs are ureotelic animals
3. Aquatic amphibians and aquatic insects are ammonotelic animals
4. Birds and reptiles are ureotelic

Subtopic:  Nitrogenous Excretory Products |
 88%
Level 1: 80%+
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Which of the following pairs is wrong?

1. Uricotelic ......... Birds

2. Ureotelic ......... Insects

3. Ammonotelic ......... Tadpole

4. Ureotelic .......... Elephant

Subtopic:  Nitrogenous Excretory Products |
 83%
Level 1: 80%+
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NEET 2026 - Target Batch - Vital
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