Each thoracic segment of Periplaneta americana is enclosed by four __ skeletal scleries: a dorsal _, a ventral __ and two lateral _. The ___ of the prothorax is also called pronotum, which covers the neck and a part of the head.
Complete the above paragraph by selecting the correct sequence of words.

Chitinous, tergum, sternum, pleura, tergum

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Proteinaceous, sternum, tergum, pleura, tergum

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Chitinous, sternum, tergum, pleura, sternum

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Proteinaceous, tergum, pleuron, sternum, tergum

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Solution

The correct option is B Chitinous, tergum, sternum, pleura, tergum
Each thoracic segment of Periplaneta americana is enclosed by four 'chitinous' skeletal sclerites: a dorsal 'tergum' a ventral ' sternum' and two lateral 'pleura'. The 'tergum' of the prothorax is also called pronotum, which covers the neck and part of the head. So, the correct answer is 'Chitinous, tergum, sternum, pleura, tergum'.

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