1. Tardigrade
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  3. Biology
  4. A female cockroach can be differentiated from a male cockroach, due to the presence of:

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Q. A female cockroach can be differentiated from a male cockroach, due to the presence of:

NTA AbhyasNTA Abhyas 2020Structural Organisation in Animals

Solution:

Male cockroach bears a pair of short, thread-like structure in $9^{\text {th }}$ abdominal segment called anal style. In both sexes, the $10^{\text {th }}$ abdominal segment bears a pair of a jointed filamentous structure called anal cerci.
In females, the $7^{\text {th }}$ sternum is boat shaped and together with the $8^{\text {th }}$ and $9^{\text {th }}$ sterna forms a brood or genital pouch whose anterior part contains female gonopore, spermathecal pores and collateral glands.