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Question

Choose the correct statement for Periplaneta americana.

A
It has 6 muscular hearts
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B
It has 10 thoracic segments
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C
Anal style is present in both male and female
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D
It is nocturnal and present in damp places
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Solution

The correct option is D It is nocturnal and present in damp places
The cockroach has a single heart which consists of an elongated muscular tube lying along mid dorsal line of its thorax and abdomen.

It has 3 thoracic segments namely prothorax, mesothorax and metathorax.

Only males bear a pair of short, threadlike anal styles.

They are nocturnal omnivores which are mostly found in damn places.

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