Which of the following structures is common to housefly and cockroach?
A
Chitinous exoskeleton
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B
Two pairs of wings
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C
Filamentous antennae
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D
Sponging mouth parts
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Solution
The correct option is B Chitinous exoskeleton A chitinous exoskeleton is common to both housefly and cockroach.
A chitin is a tough, semitransparent substance that is the main component of the exoskeleton of arthropods, such as the shells of crustaceans and the outer coverings of insects. Since, both housefly and cockroach belong to the phylum Arthropoda, chitinous exoskeleton is their common feature.