Petromyzon is a connecting link between
A. Balanoglossus and Amphioxus
B. Amphioxus and cyclostomata
C. Cyclostomata and pisces
D. Pisces and amphibians
Answer:B
Petromyzon is a connecting link between
A. Balanoglossus and Amphioxus B. Amphioxus and cyclostomata C. Cyclostomata and pisces D. Pisces and amphibians