Which animal is not ammonotelic?

Options

A. Whale
B. Bony Fishes
C. Crocodile
D. Tadpole

Answer

To determine which animal is not ammonotelic, we need to understand the classification of organisms based on their excretory products. Here’s a step-by-step breakdown of the solution:

### Step 1: Understand Excretory Product Classification
- Organisms are classified based on the form of nitrogenous waste they excrete:
- **Ammonotelic**: Excrete ammonia (e.g., many bony fishes, aquatic amphibians).
- **Ureotelic**: Excrete urea (e.g., mammals, some amphibians).
- **Uricotelic**: Excrete uric acid (e.g., reptiles, birds, insects).

### Step 2: Identify Ammonotelic Organisms
- Ammonotelic organisms are primarily aquatic, as ammonia is highly soluble in water. Examples include:
- Many bony fishes
- Aquatic amphibians (like tadpoles)
- Some aquatic insects

### Step 3: Identify Ureotelic and Uricotelic Organisms
- Ureotelic organisms, which excrete urea, include:
- Mammals (like humans)
- Some terrestrial amphibians
- Uricotelic organisms, which excrete uric acid, include:
- Reptiles (like crocodiles)
- Birds
- Insects

### Step 4: Determine the Answer
- The question asks for an animal that is not ammonotelic.
- Since crocodiles are reptiles and excrete uric acid, they are classified as uricotelic, not ammonotelic.

### Conclusion
- The animal that is not ammonotelic is **crocodile**.

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