Question

Special vascularised gills are used for the
exchange of O2 with CO2 by these
animals
(A) All arthropods and
Urochordates
(B) Fishes and echinoderms
(C) Polychaetes and adult
amphibians
(D) Most of the aquatic arthropods
and molluscs​

Answer 1

Answer:

again B..............

Answer 2

Answer:

The answer is B) Fishes and echinoderms