Q. What is common between earthworm and cockroach?
A. Nephridia
B. Closed circulation
C. Solid ventral nerve cord
D. Malpighian Tubules
Answer: Solid ventral nerve cord
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A. Nephridia
B. Closed circulation
C. Solid ventral nerve cord
D. Malpighian Tubules
Answer: Solid ventral nerve cord