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  • Which of the following is absent in a female cockroach?  Option: 1 Anal cerciOption: 2</str

Which of the following is absent in a female cockroach?
 

Option: 1

Anal cerci


Option: 2

Anal style


Option: 3

Tegmina


Option: 4

Hindwings

 


Answers (1)

best_answer

 

 

External Morphology of Cockroach: Thorax and Abdomen -

 External Morphology of Cockroach: Thorax and Abdomen

Abdomen 

  • The posterior region of the body is called abdomen and is 10 segment long. 
  • In females, the 7th sternum is boat shaped. It together with 8th and 9th segment forms a brood or genital pouch called gynatrium
  • The anterior part of genital pouch contains female gonopore, spermathecal pores and collateral glands.
  • In males, genital pouch or chamber is present in between 9th and 10th sterna.
  • The genital pouch contains dorsal anus, ventral male genital pore and gonapophysis.
  • Males bear a pair of short, thread-like anal styles which are absent in females.
  • In both sexes, the 10th segment bears a pair of jointed filamentous structures called anal cerci. 


 

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Male cockroaches bear a pair of short, thread-like anal styles which are absent in females.

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Rakesh

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