Subphylum Chelicerata: Class Merostomata
First pair of opisthosomal appendages that cover genital pore is called:
operculum
covering
lid
genital opercula
genital opercula
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Horseshoe crab has anA. open digestive system
B. open circulatory system
C. open reproductive system
D. operculum
Giant water scorpions are included in subclass
A. xiphosura
B. eurypterida
C. Arachnida
D. crustaecia
Last segment of abdomen or termination appendages in arthropods is called:
A. termination appendages
B. last part
C. anal part
D. telson
Number of living species of horseshoe crab is:
A. 2
B. 3
C. 5
D. 4
Horseshoe crab is included in subclass
A. xiphosura
B. eurypterida
C. archnida
D. crustaecia
Abdomen of spider is known as:
A. middle segment
B. telson
C. opisthosoma
D. tegument
In appendages, except, covering genital pores, collectively called as:
A. lungs
B. book lungs
C. book gills
D. gills
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