Phylum Mollusca - gastropoda

Question 1

which is the largest class under mollusa?

Answer 1

gastropoda

Question 2

what does class gastropoda include?

Answer 2

snails,slugs and limpets

Question 3

they occur in which waters?

Answer 3

mostly marine or freshwater. some are terrestrial

Question 4

how is the shell in gastropodans

Answer 4

univalve and spirally coiled

Question 5

shell can be internal in?

Answer 5

aplysia

Question 6

shell is absent in?

Answer 6

doris

Question 7

what are some distinct features?

Answer 7

head,eyes and tentacles

Question 8

where does radula occur?

Answer 8

in the buccal cavity

Question 9

what are the respiratory organs?

Answer 9

gills,lungs or both

Question 10

how is the growth of visceral mass during embryonic development?

Answer 10

one side grows faster than the other

Question 11

what does the uneven growth of visceral mass result in?

Answer 11

rotation of visceral mass upto 180 degrees (torsion)

Question 12

are they monoecious or dioecious

Answer 12

dioecious

Question 13

is the development direct and indirect?

Answer 13

indirect (includes veliger larva)

Question 14

examples of gastropodans?

Answer 14

pilla,aplysia,doris

Question 15

pilla is also called as?

Answer 15

apple snail

Question 16

aplysia is also called as?

Answer 16

sea hare

Question 17

doris is also called as?

Answer 17

sea lemon