A guanotelic animal is

Options

A. Anopheles
B. Spider
C. Earthworm
D. Prawn

Answer

To determine which of the given animals is a guanotelic animal, we need to understand what guanotelic means and analyze the excretory products of each option provided.

### Step-by-Step Solution:

1. **Define Guanotelic Animals**: Guanotelic animals are those that excrete guanine as their primary nitrogenous waste product. Guanine is a nitrogenous base that is less soluble in water, which allows these animals to conserve water.

2. **Analyze the Options**:
- **Option 1: Anopheles**: The excretory product of Anopheles (a type of mosquito) is uric acid. Therefore, Anopheles is classified as uricotelic, not guanotelic.
- **Option 2: Spider**: The excretory product of spiders is guanine. This makes spiders guanotelic animals, as they excrete guanine instead of other nitrogenous wastes.
- **Option 3: Earthworm**: Earthworms excrete both urea and ammonia, classifying them as ureotelic and ammonotelic, respectively. Thus, they are not guanotelic.
- **Option 4: Prawn**: Prawns primarily excrete ammonia, which categorizes them as aminotelic animals. Hence, they are also not guanotelic.

3. **Conclusion**: Among the options provided, the only animal that is guanotelic is the spider, as it excretes guanine.

### Final Answer:
The guanotelic animal from the options given is **Spider**.

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