Which of the following statements is wrong?

Which of the following is correct with respect to cockroach?

a. Internally mesenteron is lined with cuticle

b. In abdomen eight pair of spiracles are present

c. All sperms of seminal vesicle are glued together into spermatophore

d. Malphigian tubules are present at the junction of midgut and hindgut

1. a, b & c

2. a & b

3. b & d

4. b, c & d

Consider the following statements A, B, C & D with certain blanks. Find the option which correctly fills up these blanks

A. The ootheca of cockroach is about __(i)____ long.

B. The development of P americana is  ___(ii)___, meaning there is development through ___(iii)____ stage.

C. In the head region of cockroach, the brain is represented by ___(iv)___ ganglion, which supplies nerves to antennae and ____(v)___.

D. The respiratory system of cockroach consists of a network of trachea, that opens through ____(vi)____ of small holes called spiracles present on the ____(vii)____ side of the body.

(1) A - (i) 3 mm

     B - (ii) Paurometabolous

           (iii) Nymphal

     C - (iv) Supra-oesophageal

           (v) compound eyes

(2) B-(ii) Paurometabolous

     C-(iv) Supra-oesophageal

         (v) wings

     D -(vi) 10 pairs

          (vii) Lateral

(3) A - (i) 8 mm

     C - (iv) Sub-oesophageal

            (v) Compound eyes

     D - (vi) 10 pairs

          (vii) Dorsal

(4) A - (i) 8 mm

     B - (ii) Paurometabolous

          (iii) Nymphal

C - (iv) Supra-oesophageal

           (v) compound eyes

     D - (vi) 10 pairs

           (vii) Lateral

The respiratory system of cockroach consists of a network of trachea, that opens through _____(A)____ of small holes called ___(B)___ present on ___(C)____ side of body

Choose the option which correctly fills the blanks labelled as A, B and C

       Blank A                 Blank B                   Blank C

(1) 10 pairs                  Spiracles                    Dorsal

(2) 8 pairs                    Stigmata                    Lateral

(3) 10 pairs                   Spiracles                    Lateral

(4) 8 pairs                     Spiracles                     Ventral

Exoskeleton of each segment in cockroach consists 

1. Dorsal tergum and a ventral sternum

2. Dorsal sternum and a ventral tergum

3. Sternum only

4. Tergum only

In cockroach, foregut comprises of

1. Pharynx, oesophagus, crop and gizzard

2. Mesenteron, crop and gizzard

3. lleum, colon and rectum

4. Pharynx, oesophagus and rectum

Thin tubes that carry oxygen from the air to all the parts in cockroach constitute

1. Tracheal system

2. Haemolymph

3. Lungs

4. Gills

In frogs, cloaca receives

1. Faecal matter

2. Gametes

3. Unine

4. All of these

Respiration in insects is called direct because