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Which of the following segments is not involved in the formation of a genital pouch in male cockroaches?(a) 7^th sternum(b) 9^th tergum(c) 10^th tergum(d) 9^th sternumThis question was posed to me in semester exam.I want to ask this question from Animals in chapter Structural Organisations in Animals of Biology – Class 11

Answer»

Right option is (a) 7^th sternum

Best explanation: 7^th sternum is not involved in the formation of the genital pouch in the male cockroaches. Their genital pouch is a chamber which lies at the hind end of the abdomen. The genital chamber is BOUNDED dorsally by 9^th and 10^th terga and VENTRALLY by 9^th sternum. It CONTAINS DORSAL anus, ventral male genital pore and GONAPOPHYSIS. It is also surrounded by some phallomeres.



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