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Which of the following characteristic is incorrect with respect to cockroach?

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Head is triangular, formed by the fusion of six segments and lies anteriorly at right angles to the longitudinal body axis.

Haemolymph is composed of colourless plasma.

Malpighian tubules are lined by glandular and ciliated cells.

A pair of spermatheca is present in 6^th segment which opens into genital chamber of male cockroach.

answer is D.

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A pair of spermatheca is present in 6^th segment which opens into genital chamber of female cockroach.

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