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Read the following statements about cockroach and pick out the correct option.
a) The opening of the spiracles is regulated by sphincters.
b) The entire foregut is lined by cuticle.
c) Heart consists of elongated muscular tube lying along the mid dorsal line of thorax and abdomen.
d) The next to last nymphal stage has wing pads but only adult has wings.

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Only b, c and d are true

Only b and c are true

Only c and d are true

a, b, c and d are true

answer is D.

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Detailed Solution

The opening of the spiracles is regulated by sphincters.

The entire foregut is lined by cuticle.

Heart consists of elongated muscular tube lying along the mid dorsal line of thorax and abdomen.

The next to last nymphal stage has wing pads but only adult has wings.

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