1. Tardigrade
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  3. Biology
  4. Read the following statements about the cockroach and select the option: I. Forewings (mesothoracic) called tegmina are opaque dark and leathery and cover the hind wings. II. Head is formed by the fusion of eight segments and shows little mobility. III. Genital pouch in male is formed by 9th and 10th terga and 9th sternum.

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Q. Read the following statements about the cockroach and select the option:
I. Forewings (mesothoracic) called tegmina are opaque dark and leathery and cover the hind wings.
II. Head is formed by the fusion of eight segments and shows little mobility.
III. Genital pouch in male is formed by 9th and 10th terga and 9th sternum.

NTA AbhyasNTA Abhyas 2020Structural Organisation in Animals

Solution:

Head is triangular in shape and lies anteriorly at right angles to the longitudinal body axis. It is formed by the fusion of six segments and shows great mobility in all directions due to flexible neck.
The first pair of wings arises from mesothorax and the second pair from metathorax. Forewings (mesothoracic) called tegmina are opaque dark and leathery and cover the hind wings when at rest. The hind wings are transparent, membranous and are used in flight.
In males, genital pouch or chamber lies at the hind end of abdomen bounded dorsally by 9th and 10th terga and ventrally by the 9th sternum.