First slide

Cockroach

Question

Which of the following abdominal sterna does not contribute to the formation of brood pouch in the female Periplaneta?

Easy

A

9^th sternum
B

7^th sternum
C

6^th sternum
D

8^th sternum

Solution

In the female Periplaneta, the 7^th abdominal sternum is boat-shaped and together with the 8^th and 9^th sterna forms a brood or genital pouch. The anterior part of the brood pouch contains female gonopore, spermathecal pores and the openings of collateral glands.

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