Archenteron is cavity in

Options

A. Blastula
B. Gastrula
C. Zygote
D. Morula

Answer

**Step-by-Step Solution:**

1. **Understanding the Term "Archenteron":**
- The archenteron is defined as the primitive digestive cavity that forms during the early stages of embryonic development.

2. **Identifying the Developmental Stages:**
- The stages of embryonic development include the zygote, blastula, gastrula, and neurula.
- Each of these stages represents a different phase in the development of an embryo.

3. **Recognizing the Stage of Gastrulation:**
- Gastrulation is a crucial phase in embryonic development where the single-layered blastula reorganizes into a multilayered structure called the gastrula.
- During this process, the archenteron forms as the inner cavity of the gastrula.

4. **Conclusion:**
- The archenteron is specifically present during the gastrula stage of development, not during the zygote, blastula, or neurula stages.

**Final Answer:**
The archenteron is a cavity present in the gastrula stage of embryonic development.

---