Ascaris is

Options

A. monoecious
B. pseudocoelomate
C. acoelomate
D. free living

Answer

To answer the question "Ascaris is:", we will analyze the options provided and determine the correct classification for Ascaris.

### Step-by-Step Solution:

1. **Understanding the Term "Monoecious":**
- Monoecious organisms are those that have both male and female reproductive organs in the same individual.
- Ascaris, a genus of parasitic worms, does not have both male and female reproductive organs in one individual; it has separate sexes (male and female).
- **Conclusion:** Ascaris is not monoecious.

**Hint:** Remember that monoecious organisms have both reproductive organs in one individual.

2. **Analyzing the Term "Pseudoceolomate":**
- Pseudoceolomate refers to organisms that have a body cavity (coelom) that is not completely lined by mesoderm.
- Ascaris has a body cavity that is lined by muscle but not completely surrounded by mesoderm, fitting the definition of a pseudoceolomate.
- **Conclusion:** Ascaris is a pseudoceolomate.

**Hint:** Pseudoceolomates have a body cavity that is partially lined by mesoderm.

3. **Understanding the Term "Acoelomate":**
- Acoelomate organisms do not have a body cavity at all.
- Since Ascaris has a body cavity, it cannot be classified as acoelomate.
- **Conclusion:** Ascaris is not acoelomate.

**Hint:** Acoelomates lack any body cavity.

4. **Defining "Free Living":**
- Free living organisms are those that live independently in their environment, such as in water or soil.
- Ascaris is a parasitic organism that lives in the intestines of its host (usually animals), which means it does not live freely in the environment.
- **Conclusion:** Ascaris is not free living.

**Hint:** Free living organisms thrive in their natural habitats without dependence on a host.

### Final Answer:
Ascaris is a **pseudoceolomate** organism.