Adult frog and land snails are respectively

Options

A. Uricotelic and uricotelic
B. Ammonotelic and ureotelic
C. Ureotelic and uricotelic
D. Ammonotelic and ammonotelic

Answer

To solve the question regarding the excretory products of adult frogs and land snails, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Nitrogenous Wastes**:
- There are three main types of nitrogenous wastes produced by animals: ammonia, urea, and uric acid.
- Ammonia is highly toxic and requires a lot of water to be excreted, making it suitable for aquatic animals.
- Urea is less toxic and is excreted by terrestrial animals that have access to some water.
- Uric acid is the least toxic and is excreted by animals that need to conserve water, such as birds and reptiles.

2. **Identify the Excretory Product of Adult Frogs**:
- Adult frogs are amphibians. They primarily excrete urea, making them ureotelic. This is because they live on land and need to conserve water while still being able to excrete nitrogenous waste.

3. **Identify the Excretory Product of Land Snails**:
- Land snails are terrestrial mollusks. They excrete uric acid, which makes them uricotelic. This adaptation helps them conserve water in their terrestrial environment.

4. **Match the Excretory Products with the Options Provided**:
- Now that we have identified that adult frogs are ureotelic and land snails are uricotelic, we can match this information with the options given in the question.

5. **Select the Correct Option**:
- The only option that correctly states that adult frogs are ureotelic and land snails are uricotelic is the third option.

### Conclusion:
The correct answer is that adult frogs are ureotelic and land snails are uricotelic.

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