Nerve cord is _____ in invertebrates.

Options

A. dorsal
B. lateral
C. ventral
D. absent

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the position of the nerve cord in invertebrates. We need to identify whether it is dorsal, lateral, ventral, or absent.

2. **Identifying the Nerve Cord in Invertebrates**: Invertebrates typically have a ventral nerve cord. This means that the nerve cord is located on the underside (ventral side) of the organism.

3. **Defining the Ventral Nerve Cord**: The ventral nerve cord is a bundle of nerve fibers that runs along the longitudinal axis of the body of the invertebrate. It is typically a solid double strand of paired nerve cords.

4. **Examples of Invertebrates with Ventral Nerve Cord**: Common examples include:
- Nematodes (roundworms)
- Annelids (such as earthworms)
- Arthropods (including insects)

5. **Conclusion**: Based on the information gathered, the nerve cord in invertebrates is ventral.

**Final Answer**: Nerve cord is **ventral** in invertebrates.

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