Sharks and dogfishes differ from skates and rays
because
(a) gill slits are ventrally placed
(b) head and trunk are widened considerably
(c) distinct demarcation between body and tail
(d) their pectoral fins distinctly marked off from
cylindrical bodies
because
(a) gill slits are ventrally placed
(b) head and trunk are widened considerably
(c) distinct demarcation between body and tail
(d) their pectoral fins distinctly marked off from
cylindrical bodies