Blastostyle of Obelia bears

Options

A. Tentacles
B. Polyps
C. Medusae
D. Gonads.

Answer

**Step-by-Step Solution:**

1. **Understanding the Structure**: The blastostyle of Obelia is a specialized structure found in the colonial organism Obelia, which is part of the phylum Cnidaria. It plays a crucial role in the reproductive cycle of this organism.

2. **Identifying the Components**: The blastostyle bears a structure known as the Medusa. The Medusa is the free-swimming stage in the life cycle of Cnidarians, which is typically bell-shaped and has tentacles.

3. **Surrounding Structures**: The blastostyle is surrounded by a structure called Gonotheca, which is a protective covering. Within the Gonotheca, there are pore-like structures known as Gonophores.

4. **Function of the Medusa**: The developing Medusa within the blastostyle can be released through the Gonophore into the surrounding water. This is where fertilization occurs, leading to the next generation of organisms.

5. **Conclusion**: Therefore, the blastostyle of Obelia bears a growing Medusa, which is the correct answer to the question.

**Final Answer**: The blastostyle of Obelia bears a Medusa.

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