Question

Head of the cockroach according to its position is known as
A. Hypopharynx
B. Hepatocerebral
C. Hypognathous
D. Supragnathus

Answer 1

Hint: Cockroach belongs to the phylum Arthropoda (jointed appendages). After head removal cockroach still remains alive for a week. The head is vertically oriented in the cockroach.

Complete answer: Insects are classified broadly into three categories on the basis of the orientation of the head during the resting position with respect to the long or the vertical axis of the body of the insect. They are as follows. -
 a. Prognathous: In these types of insects, the head is horizontally oriented. The parts of their mouth interiorly. Examples of such insects are carabid beetles and earwigs
b. Hypognathous: In these types of insects, the head is vertically oriented. The parts of their mouth are pointed ventrally downwards. Examples of such insects are cockroaches, grasshoppers, houseflies, and honey bees.
c. Opisthognathous: In these types of insects, the head is obliquely oriented. The parts of their mouth are pointed ventro-posteriorly rearwards. Examples of such insects are leafhoppers, aphids, and whiteflies.

So, the correct answer is option C.

Note: Cockroaches are insects of the order Blattodea. They are known as roach as well. They belong to the phylum Arthropoda and class Insecta. They are the most common pests. There are 3000 species of cockroaches. They reproduce through eggs.