1.

Question 1

study of molluscs

Answer 1

malacology

Question 2

conchology

Answer 2

study of molluscan shells

Question 3

freshwater mollusca

Answer 3

gastropods and bivalve

Question 4

——— occurs during their develoent

Answer 4

torsion

Question 5

calcareous shell secrested by

Answer 5

mantle epithelium

Question 6

anterior region of head bears

Answer 6

sensory tentacles

Question 7

space between mantle and visceral hump

Answer 7

mantle cavity or pallial cavity

Question 8

mantle cavity has

Answer 8

comb like gills 
osphradium 
anus 
nephridiopres 
genopores

Question 9

schizoceolom is

Answer 9

reduced and represented by space around the heart

Question 10

principal body cavity is

Answer 10

haemocoel

Question 11

buccle cavity has file like rasping organ called

Answer 11

radula

Question 12

respiratory pigment

Answer 12

copper containin haemocyanin

Question 13

how many chambered heart

Answer 13

THREE (only one ventricle)

Question 14

in molluscs kidneys aka

Answer 14

organs of bojanus

Question 15

some nervous ganglia are associated with

Answer 15

circumoesophageal nerve ring

Question 16

ganglia of a pair are connected by

Answer 16

commisures

Question 17

ganglia of different pairs are connected by

Answer 17

connective

Question 18

sense organ which helps in detecting the quality of water

Answer 18

osphradium

Question 19

larvaes of mollucs

Answer 19

TROCHOPHORE

VELIGER LARVA