| Column-I (Excretory organs) | Column-II (Animals) | ||
| A. | Nephridia | p. | Hydra |
| B. | Malpighian tubules | q. | Leech |
| C. | Protonephridia | r. | Shark |
| D. | Kidneys | s. | Flatworms |
| t. | Cockroach |
A) A - q, B -1, C - s, D - r
B) A - s, B - q, C - p, D - t
C) A -1, B - q, C - s, D - r
D) A - q, B - s, C -1, D - p
Correct Answer: A
Solution :
Nephridia are the excretory organs of Annelids, (e.g., Earthworm, Leech etc.). Malpighian tubules are the excretory organs of orthropods (e.g.. Cockroach) Protonephridia are the excretory organs of Platyhelminths (e.g. Taenia, Fasciola). Kidney is the excretory organ of Mammals (e.g., Man, Shark, Cow etc.) and there is no special organ for excretion in Hydra. In Hydra excretion occurs through simple diffusion.
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