Which is not uricotellic

Options

A. Frog
B. Cockroach
C. Birds
D. Lizard

Answer

To determine which organism is not uricotellic, we need to understand the classification of organisms based on their nitrogenous waste excretion methods. Here’s a step-by-step breakdown of the solution:

### Step-by-Step Solution:

1. **Understand the Types of Nitrogenous Waste Excretion**:
- Organisms can be classified into three categories based on the form of nitrogenous waste they excrete:
- **Uricotelic**: Excrete uric acid (e.g., birds, reptiles, terrestrial arthropods).
- **Ureotelic**: Excrete urea (e.g., mammals, including humans, and terrestrial amphibians).
- **Ammonotelic**: Excrete ammonia (e.g., most aquatic organisms like fish).

2. **Analyze the Given Options**:
- The options given in the question are:
- A) Frog
- B) Cockroach
- C) Birds
- D) Lizard

3. **Identify the Excretion Method for Each Option**:
- **Frog**: Frogs are terrestrial amphibians and they excrete urea, making them ureotelic.
- **Cockroach**: Cockroaches are arthropods and they excrete uric acid, making them uricotelic.
- **Birds**: Birds excrete uric acid, making them uricotelic.
- **Lizard**: Lizards are reptiles and they also excrete uric acid, making them uricotelic.

4. **Determine Which Organism is Not Uricotellic**:
- From the analysis, the frog is the only organism in the list that does not excrete uric acid. Instead, it excretes urea, which classifies it as ureotelic.

5. **Conclusion**:
- Therefore, the answer to the question "Which is not uricotellic?" is **Frog**.

### Final Answer:
**Frog** is not uricotellic.

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