The mouth part of the cockroach shown in the given diagram acts as a/an:

1. Upper lip

2. Tongue

3. Lower lip

4. Uvula

Which of the following is correctly states as it happens in the common cockroach?

(1) Oxygen is transported by haemoglobin in blood

(2) Nitrogenous excretory product is urea

(3) The food is ground by mandibles and gizzard

(4) malpighian tubules are excretory organs projecting out from the colon

The triangular head of cockroach is made by fusion of how many segments :

(1) Three

(2) Five

(3) Nine

(4) Six

A pair of antennae arise from

Which of the following is not suitable for hypopharynx?

The head is connected with thorax-

Mark the incorrect statement with respect to head of cockroach

(1) Head is triangular in shape and lies anteriorly at right angle to the longitudinal body axis

(2) Formed by fusion by six segments and shown great mobility in all directions due to flexible neck

(3) First basal podomere of antennae is smallest and is called pedicel which articulates with antennae socket

(4) On each lateral side it bears a large and blackish compound eye

Following is the diagram of mouth parts of cockroach

Which of the following labelled structures will help in grinding and chewing of food?

(1) A & D

(2) B & C

(3) A & C

(4) D & E