Question

which of the following is incorrect pair?

a Labrum: Upper Lip
h Gonapophyses : Tongue
c. Labium : Lower Lip
d. Mandibles : Jaws
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Answer 1

The incorrect pair is gonapophysis - tongue.

- Gonapophysis is an organ which is situated in the insect body's anal region.

- These are also known as the phallomeres.

- These organs help in the stinging activities of the insects.

- And these organs have no link or relationship with the tongue of any living organism because tongue is situated in the front part of the body and the gonapophysis is situated in the back (anal) part of the body.

Answer 2

Gonapophyses : Tongue is incorrect pair.

Option: (b)

Explanation:  

• In case of cockroaches the mandibles are known as the jaw. There two jaws the upper jaw and lower jaw.

• The upper lip of cockroach is known as labrum and the lower lip is known as labium. The gonapophyses is the odd one out here.  

• This is because this is an organ which is situated at the posterior part of the body of the cockroach. It places an important role in stinging other organisms.

• It has no relation with the tongue since the tongue is placed in the anterior part of the body and is associated with sensation of taste.

Learn more about Gonapophyses

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