71.
Shell is absent in
A
Octopus
B
Sepia
C
Nautilus
D
All of the above
Answer :
Octopus
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72.
Leucon type canal system is found in
A
Sycon
B
Leucosolenia
C
Spongilla
D
All of the above
Answer :
Spongilla
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73.
Metameric segmentation is the charcteristis of
A
Mollusca and Chrodata
B
Platyhelminthes and Arhtropoda
C
Enchinodermata and Annelida
D
Annelida and Arthropoda
Answer :
Annelida and Arthropoda
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74.
Most primitive mollusca is
A
Patella
B
Neopilina
C
Chiton
D
Dentalium
Answer :
Neopilina
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75.
A sexual stage called medusa is found in
A
Star fish
B
Hydra
C
Obelia
D
None of the above
Answer :
Obelia
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76.
Three lips are present around the mouth of Ascaris. These are
A
One dorsomedion one lateral and one ventral
B
One doromedion and two ventro lateral
C
All the ventral
D
All are dorsal
Answer :
One doromedion and two ventro lateral
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77.
Sternum in Birds is
A
Poorly developed
B
Well developed
C
Absent
D
None of the above
Answer :
Well developed
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78.
Torpedo is commonly known as
A
Suckerfish
B
Eelctric ray
C
Globefish
D
Sea horse
Answer :
Eelctric ray
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79.
Ascaris is found as endoparasite in
A
Blood of man
B
Intestine of man
C
Muscles of pig
D
Body cavity of man
Answer :
Intestine of man
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80.
Pearls are
A
Sereted by mantle of mollusca
B
Secreted by foot of mollusca
C
Made of only prismatic layer of mollusca shell
D
Ground pieces of shell
Answer :
Sereted by mantle of mollusca
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