Phylum Mollusca: Class Gastropoda
Members of class Gastropoda have
open circulatory system
close circulatory system
lack circulatory system
complete circulatory system
open circulatory system
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Many snails that are living in marine ecosystem are:A. monoceious
B. dioceous
C. males
D. female
Sea hares and sea slugs are included in subclass
A. pulmonata
B. Prosobranchia
C. opisthobranchia
D. gastropoda
Prosobranchia is subclass of class
A. bivalvia
B. gastropoda
C. cephalopoda
D. Annelida
In some gastropods, mantle in form of a rolled extension named as:
A. shell
B. sheath
C. siphon
D. ocelli
In gastropods, spiral cleavage results in formation of free-living larva named as:
A. trochophore
B. Muller’s larva
C. dipleurula
D. planula
How many species of subclass Pulmonata have?
A. 17,000 species
B. 19,000 species
C. 15,000 species
D. 12,000 species
Smallest gastropods propel themselves over mucous trail by help of:
A. cilia
B. flagella
C. foot
D. pedal
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