Question
Distinguish between Ammonotelism and Uricotelism.
| No. | Ammonotelism | Uricotelism |
| i. | It is the elimination of nitrogenous waste in the form of ammonia. | It is the elimination of nitrogenous waste in the form of uric acid. |
| ii. | Excretion of ammonia requires plenty of water. | Excretion of uric acid requires negligible amount of water. |
| iii. | Removal of 1 gm of ammonia requires 300 – 500 ml of water. | Removal of 1 gm of uric acid requires 10ml of water. |
| iv. | Ammonia is very toxic. | Uric acid is less toxic. |
| e.g. | It is found in aquatic invertebrates, bony fishes and aquatic/ larval amphibians, etc. | It is seen in birds, some insects, many reptiles, land snails, etc. |
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| Column I (Phases) | Column II (Their events) |
| 1. Leptotene | (a) Crossing over |
| 2. Zygotene | (b) Desynapsis |
| 3. Pachytene | (c) Synapsis |
| 4. Diplotene | (d) Bouquet stage |