Question

In cockroach elytra are articulated to the tergites of
A.Prothorax
B.Mesothorax
C.Metathorax
D.Abdomen

Answer 1

Hint: In cockroaches, the thorax consists of three portions: namely the prothorax, followed by mesothorax and the last segment is the metathorax. The primary pair of wings arises from mesothorax and the second pair from metathorax.

Complete step by step answer:
The mesothoracic forewings called tegmina or elytra, are opaque, dark and leathery. Mesothorax - lies in the center of the other two segments within the thorax of an insect, and bears the second pair of legs. Its principal sclerites (exoskeletal plates) are the mesonotum (dorsal), the mesosternum (ventral), and the mesopleuron (lateral) on all sides. Nearly all the adult insects are characterized by the presence of legs on the mesothorax. Metathorax – is the last and the posterior section of any of the three segments within the thorax of an insect, and it has the third pair of legs attached to it. Its principal sclerites (exoskeletal plates) are the metanotum (dorsal), the metasternum (ventral), and the metapleuron (lateral) on all sides.

So, the proper answer is option B. Mesothorax.

Note:
It is important to note that the prothoracic legs are closest to the cockroach's head. These are the shortest legs, and that they act like brakes when the roach runs. The center legs are the mesothoracic legs.