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Notochord is persistent throughout life ...

Notochord is persistent throughout life in

A

Pristis

B

Rana

C

Hippocampus

D

Ascidia

Text Solution

AI Generated Solution

The correct Answer is:
To determine which organism has a persistent notochord throughout its life, we can analyze the options provided: Prestige, Rana, Hippocampus, and Ascidia. ### Step-by-Step Solution: 1. **Understand the Notochord**: The notochord is a flexible rod-like structure that provides support and is a characteristic feature of chordates. In many vertebrates, it is replaced by the vertebral column during development. 2. **Evaluate the Options**: - **Prestige**: This term seems to be a typographical error or misinterpretation. If it refers to a specific organism, it is not commonly recognized in biological taxonomy. However, if we consider it as a general term, it is not relevant to notochord persistence. - **Rana (Frogs)**: Frogs are amphibians and have a notochord during their embryonic stage, but it is replaced by a vertebral column in adult forms. Thus, the notochord is not persistent throughout life in Rana. - **Hippocampus (Seahorses)**: Seahorses are part of the family Syngnathidae and retain a notochord throughout their lives. They are unique among fish in that their notochord remains as a supportive structure. - **Ascidia (Sea Squirts)**: Ascidia are marine invertebrates that possess a notochord during their larval stage, but it is lost in the adult form. Therefore, the notochord is not persistent throughout life in Ascidia. 3. **Conclusion**: Based on the evaluation, the organism that retains a notochord throughout its life is **Hippocampus**. ### Final Answer: The correct answer is **Hippocampus**.
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