![Which of the following systems is found in echinoderms?](https://www.gkseries.com/blog/wp-content/uploads/2022/01/Which-of-the-following-systems-is-found-in-echinoderms.png)
Q. Which of the following systems is found in echinoderms?
A. Nervous system
B. Excretory system
C. Respiratory system
D. System of internal skeleton
Answer: System of internal skeleton
A. Nervous system
B. Excretory system
C. Respiratory system
D. System of internal skeleton
Answer: System of internal skeleton
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