a) Digestion is ……………… in Branchiostoma.

b) Elasmobranchs have a ……………… mouth.

c) The flagellated chamber of the canal system of sponges is lined by ……………

d) The ……………… of the filarial worm releases small microfilariae into blood and lymphatic system.

e) The special comb-like sense organs of scorpions are ……………… .

f) The fused pair of maxillae of millipedes is called ……………… .

g) ……………… is the only living genus under the subclass Nautiloidea.

h) In cephalopods a pair of ……………… hearts pump the blood through the gills.

i) Nephridia are ……………… in hemichordates.

j) The bipinnaria larva of ……………… is similar to tornaria larva.

a) Digestion is extracellular and intracellular in Branchiostoma.

b) Elasmobranchs have a ventral mouth.

c) The flagellated ____ _______ ______ ______ __________ _________ ______ ______ __________.
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_________ ____ _______ ____ ___ _____.
__________ _____ ________ _________ _________.
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