Animals devoid of respiratory, excretory and circulatory organs belong to phylum ………… (DPMT 2004)
A. echinodermata
B. platyhelminthes
C. porifera
D. mollusca
Answer:C
Animals devoid of respiratory, excretory and circulatory organs belong to phylum ………… (DPMT 2004)
A. echinodermata B. platyhelminthes C. porifera D. mollusca