Which of the following groups of animals are uricotelic ?

Options

A. Reptiles, birds, land snails, insects
B. Reptiles, birds, land snails
C. Aquatic amphibians, birds,land snails, insects
D. Amphibians, reptiles, birds, insects

Explanation

To determine which groups of animals are uricotelic, we need to understand what uricotelic means and identify the animals that fall into this category. Here’s a step-by-step solution:

### Step 1: Understand Uricotelic
- **Definition**: Uricotelic animals are those that excrete their nitrogenous waste primarily in the form of uric acid. This adaptation is beneficial for conserving water, especially in terrestrial environments.

### Step 2: Identify Examples of Uricotelic Animals
- Common examples of uricotelic animals include:
- **Reptiles**: All reptiles excrete uric acid.
- **Birds**: Birds also excrete uric acid.
- **Land Snails**: These mollusks excrete uric acid as well.
- **Insects**: Most insects are uricotelic.

### Step 3: Analyze the Options Given
- **Option 1**: Reptiles, birds, land snail, and insects.
- This option includes all the groups mentioned as uricotelic.

- **Option 2**: Reptiles, birds, land snail (missing insects).
- This option is incorrect as it omits insects, which are also uricotelic.

- **Option 3**: Aquatic amphibians, birds, land snail, and insects.
- This option is incorrect because aquatic amphibians excrete ammonia, not uric acid.

- **Option 4**: Amphibians (not specified as aquatic), birds, land snail, and insects.
- This option is incorrect as amphibians generally excrete ammonia, not uric acid.

### Step 4: Conclusion
- The correct answer is **Option 1**: Reptiles, birds, land snail, and insects, as all these groups are uricotelic.

### Final Answer:
**The group of animals that are uricotelic includes reptiles, birds, land snails, and insects.**

---