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Q.

Tracheal system of cockroach opens out through spiracles located on

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a

dorsal side of head and thorax

b

lateral sides of thorax and abdomen

c

ventral side of thorax and abdomen

d

anterior side of the head

answer is B.

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Detailed Solution

Tracheal system of cockroach opens out through spiracles located on the pleura (lateral sclerites). Cockroach has two pairs of spiracles in the thorax (in pair in each of mesothorax and metathorax) and eight pairs of spiracles in the abdomen (in the first eight abdominal segments).

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