Development in ctenophores is

Options

A. Direct
B. indirect
C. Direct with cydipid larva
D. Indirect with cydipid larva

Answer

### Step-by-Step Solution:

1. **Understanding Development Types**:
- There are two types of development in animals: direct and indirect.
- **Direct Development**: In this type, the young ones that hatch from eggs are miniature versions of the adults. There is no metamorphosis involved. The young grow into adults without undergoing significant changes in body structure.
- **Indirect Development**: In this type, the young ones (larvae) look very different from the adults. After hatching, they go through a larval stage, which eventually undergoes metamorphosis to transform into the adult form.

2. **Identifying Development in Ctenophores**:
- Ctenophores, which belong to the phylum Ctenophora, exhibit **indirect development**.
- After the fertilization of the egg, the larval stage that emerges is called **Cydippid larva**.

3. **Characteristics of Cydippid Larva**:
- The Cydippid larva is motile, meaning it can move around.
- This larval stage is significantly different from the adult form, which is a key characteristic of indirect development.

4. **Conclusion**:
- Since ctenophores undergo indirect development with a larval stage known as Cydippid larva, the correct statement regarding their development is: **"Ctenophores exhibit indirect development with Cydippid larva."**

### Final Answer:
Ctenophores exhibit indirect development with Cydippid larva.

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