MOLLSUCS

Question 1

they are also called

Answer 1

soft bodied animals

Question 2

habitat

Answer 2

marine, fresh water, damp soil

Question 3

examples

Answer 3

snail, osyters, octupus, clams, slugs, toredo,

Question 4

form of living

Answer 4

sessile
free living

Question 5

body is divided into

Answer 5

head
ventral muscular foot
dorsal visceral region

Question 6

the body is covered by

Answer 6

mantle

Question 7

mantle secretes what in some molluscs

Answer 7

shell

may be internal or external

Question 8

molluscs having external shells

Answer 8

snails,

Question 9

mollsucs having internal shell

Answer 9

cuttle fish

Question 10

molluscs having no shell

Answer 10

octupus

Question 11

the body is unsegmented

Question 12

digestive system contains

Answer 12

rasping organ radula
empties into mantle

Question 13

excretory system

Answer 13

metanephridia
wastes empties into percardial cavity

Question 14

repro

Answer 14

sexes may be separate- unio
or united- helix

Question 15

coelom is divided into

Answer 15

sinuses

Question 16

development takes place through

Answer 16

trochophore larvae

also in annelida- earthworms

Question 17

respiration occurs through

Answer 17

gills, lungs mantle, body surface

Question 18

nervous system

Answer 18

paired cerebral, pleural, pedal and visceral ganglia with NERVE CORD

Question 19

shell of mussesl

Answer 19

button - ornaments

Question 20

source of food

Answer 20

clams eaten in europe america and far east

Question 21

oysters make

Answer 21

valuable pearls

Question 22

which is inuriouus to garden and cultivation

Answer 22

slugs

Question 23

which is harmful for ships

Answer 23

toredo-shipworm