A) Palaemon
B) Palamnaeus
C) Pediculus
D) Peripianeta
Correct Answer: B
Solution :
The scorpions are the oldest known terrestrial arthropods, about 800 species have been described, some common genera are Palamnaeus, Buthus, etc. All scorpions are viviparous and the females carry the young ones on their backs for some time, for about a week.
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