Notochord in earthworm is____and nerve cord is____.

Options

A. Dorsal, ventral
B. Absent, ventral
C. ventral, absent
D. absent, dorsal

Explanation

To answer the question regarding the notochord and nerve cord in earthworms, we can break down the solution into the following steps:

### Step-by-Step Solution:

1. **Identify the Organism**:
- The organism in question is the earthworm, which belongs to the phylum Annelida.

2. **Understand the Structure of Earthworms**:
- Earthworms are classified as invertebrates, meaning they do not possess a backbone or vertebral column.

3. **Determine the Presence of Notochord**:
- The notochord is a flexible rod-like structure found in some animals, particularly in chordates. In earthworms, the notochord is **absent**.

4. **Determine the Position of the Nerve Cord**:
- Earthworms have a nerve cord, which is a part of their nervous system. In earthworms, the nerve cord is located on the **ventral** side of the body.

5. **Fill in the Blanks**:
- Based on the above information, we can fill in the blanks:
- Notochord in earthworm is **absent**.
- Nerve cord is **ventral**.

6. **Select the Correct Option**:
- From the provided options, the correct choice is:
- Option 2: absent and ventral.

### Final Answer:
- Notochord in earthworm is **absent** and nerve cord is **ventral**.

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