Which one of the following statements is incorrect?

Options

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

Answer

To solve the question of identifying the incorrect statement regarding excretory products in animals, we can follow these steps:

### Step 1: Understand the Types of Excretion
- **Uricotelic Animals**: These animals excrete nitrogenous waste in the form of uric acid. Examples include birds and reptiles.
- **Ureotelic Animals**: These animals excrete nitrogenous waste as urea. Examples include mammals and frogs.
- **Ammonotelic Animals**: These animals excrete ammonia as nitrogenous waste. This is common in aquatic animals since ammonia is highly toxic and requires a lot of water to be eliminated.

### Step 2: Analyze the Statements
- The question provides statements about different groups of animals and their excretory products. We need to identify which statement is incorrect based on the definitions above.

### Step 3: Evaluate Each Statement
- **Statement about Birds and Reptiles**: If the statement claims that birds and reptiles are ureotelic, it is incorrect because they are uricotelic (they excrete uric acid).
- **Statement about Mammals and Frogs**: This statement is correct as they are ureotelic (they excrete urea).
- **Statement about Aquatic Amphibians and Aquatic Insects**: This statement is also correct as they are ammonotelic (they excrete ammonia).

### Step 4: Identify the Incorrect Statement
- The incorrect statement is the one that claims birds and reptiles are ureotelic. They are actually uricotelic.

### Conclusion
The incorrect statement is that birds and reptiles are ureotelic animals.

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