Which of the following are true about molluscs?
a) digestive system is well developed and body is haemocoel
b) blood vascular system consists of single heart with 1 venrticle and 1 or 2 atria
c) have three pairs of ganglia connected by nerve cords, sexes are separate
d) all of these
In molluscs, the development is either direct or a larva is formed called……..
a) Planula
b) Trochophore
c) Bipinnaria
d) Glochidium
The animals of which of the following phylum are used in jewelry?
a) mollusca
b) platyhelminthes
c) echinodermata
d) chordata
Explanation: the pearl formed by marine mussel is used in jewelry
Which of the following molluscs are eaten as delicacy in many countries of the world?
a) snail
b) octopus
c) cuttle fish
d) both b and c
The scientific name of the garden snail is
a) Helix aspersa
b) Limax maximus
c) Anodonta grandis
d) Mytilus edulis
The scientific name of the slug is……..
a) Helix aspersa
b) Limax maximus
c) Anodonta grandis
d) Mytilus edulis
