Ascaris is

Options

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

Answer

**Step-by-Step Solution:**

1. **Understanding Ascaris**: Ascaris is a genus of parasitic roundworms, commonly known as intestinal roundworms. They belong to the phylum Nematoda.

2. **Excretory System**: In Ascaris, the excretory organ is called the renal cell. This organ plays a crucial role in the removal of waste products from the body.

3. **Types of Excretion**: Ascaris exhibits two types of excretion:
- **Ureotelic**: This means that urea is one of the primary waste products excreted. Urea is less toxic than ammonia and is excreted by many terrestrial organisms.
- **Ammonotelic**: This refers to the excretion of ammonia, which is typical in aquatic organisms where ammonia can be easily diluted in water.

4. **Pseudocoelomate Structure**: Ascaris is classified as a pseudocoelomate, meaning it has a body cavity that is not completely lined by mesoderm. The pseudocoelomic fluid helps in the process of excretion by creating pressure that aids in the ultrafiltration of waste products through the excretory system.

5. **Conclusion**: Since Ascaris can excrete both urea and ammonia, it is classified as ureotelic (due to the excretion of urea) and ammonotelic (due to the excretion of ammonia). However, the question specifically asks for the classification based on the predominant waste product, which is urea.

6. **Correct Answer**: Therefore, the correct option is option 1: Ascaris is ureotelic and ammonotelic.