Which of the following statements is incorrect ?

Options

A. Birds and land snails are uricotelic animals.
B. Mammals and frogs are ureotelic animals
C. Aquatic amphibians and aquatic insects are ammonotelic animals
D. Birds and reptiles are ureotelic

Answer

To determine which of the following statements is incorrect, we need to analyze each statement regarding the type of nitrogenous waste excreted by different groups of animals.

1. **Statement 1**: Birds and land snails are uricotellic animals.
- **Analysis**: This statement is correct. Birds and land snails excrete nitrogenous waste in the form of uric acid, which is characteristic of uricotellic animals.

2. **Statement 2**: Mammals and frogs are ureotellic.
- **Analysis**: This statement is also correct. Mammals and frogs excrete urea as their primary nitrogenous waste, classifying them as ureotellic animals.

3. **Statement 3**: Aquatic amphibians and aquatic insects are ammonotellic.
- **Analysis**: This statement is correct as well. Aquatic amphibians and aquatic insects excrete ammonia, which is typical of ammonotellic animals.

4. **Statement 4**: Birds and reptiles are ureotelic.
- **Analysis**: This statement is incorrect. Birds and reptiles excrete uric acid, making them uricotellic, not ureotelic.

**Conclusion**: The incorrect statement is the fourth option: "Birds and reptiles are ureotelic."