In embryo stage, cockroach has 20 segments in its body but in adult stage it has only 14 segments which part of the body has same number of segments in both embryo and adult stage?
A
Head
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B
Thorax
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C
Abdomen
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D
Both a and b
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Solution
The correct option is B Thorax In embryo stage, cockroach has 20 segments (6 head + 3 thorax + 11 abdomen) in its body.
In adult stage, cockroach has only 14 segments (1 head + 3 thorax + 10 abdomen).
Hence, thorax has same number of segments in embryo and adult stage.