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
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 |
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 |
Which of the following pairs is wrong?
1. Uricotelic ......... Birds
2. Ureotelic ......... Insects
3. Ammonotelic ......... Tadpole
4. Ureotelic .......... Elephant