Number of species that are included in order Gymnophonians, confined to tropical regions is:

120 species
160 species
165 species
600 species
160 species  

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Member of Gymnophiona lacks
A. lungs
B. limbs
C. eyes
D. head
Transport of chemicals from environment to olfactory cells is mediated by the:
A. tentacles
B. retractile tentacle
C. smelling
D. sniffing
Caecilians are nearly blind because eyes are:
A. bulging
B. covered with skin
C. small
D. protruding

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