Nutrition in Ascaris, the common roundworm parasite, is

Options

A. Saprozoic
B. Parasitic
C. Holozoic
D. Mixotrophic

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the type of nutrition exhibited by Ascaris, the common roundworm parasite.

2. **Identifying the Options**: The options provided are:
- A) Saprophytic
- B) Parasitic
- C) Holozoic
- D) Mixotrophic

3. **Analyzing Each Option**:
- **Saprophytic Nutrition**: This type of nutrition involves organisms that feed on dead and decaying organic matter. They secrete enzymes to break down this matter into simpler substances. Ascaris does not fit this category as it does not feed on decaying matter.

- **Parasitic Nutrition**: This mode of nutrition involves an organism deriving its food from another living organism (the host) without killing it. Ascaris is a parasite that lives in the intestines of its host and absorbs nutrients from the host's digested food. This is the correct option.

- **Holozoic Nutrition**: This type involves organisms that consume solid organic food, such as whole plants or animals. Ascaris does not consume solid food in this manner, so this option is incorrect.

- **Mixotrophic Nutrition**: This refers to organisms that can utilize both autotrophic (self-feeding) and heterotrophic (feeding on others) methods. Ascaris does not exhibit this type of nutrition, making this option incorrect as well.

4. **Conclusion**: Based on the analysis, the correct answer is **B) Parasitic**. Ascaris derives its nutrition by living in the host's intestines and absorbing nutrients without killing the host.