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Which of the following segments is not involved in the formation of a genital pouch in male cockroaches?

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in Biology – Class 11 by (272k points)
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 sternum

This 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

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Best 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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