Complete the following sentence by choosing the appropriate option:
Digestive juice in cockroach is secreted by a ring of blind tubules which are ______ in number.
(1) 100-150
(2) 9-10
(3) 6-8
(4) 15-20
Which among the following statements are incorrect with respect to cockroach ?
(1) It has mosaic vision with high sensitivity and less resolution.
(2) Salivary reservoir has eight highly chitinous plates called as teeth.
(3) Tracheoles carry oxygen from air to all other body parts.
(4) Blood is devoid of respiratory pigment.
Which among the following is differentiated into ileum, colon and rectum ?
(1) Caecum
(2) Foregut
(3) Midgut
(4) Hindgut
Pharynx of cockroach is
(1) Short, tubular
(2) Opens to crop
(3) Mouth leads to pharynx
(4) All the above
Find the incorrect match.
(1) Junction of midgut and hindgut- Malpighian tubules
(2) Gizzard- Chitinous plates
(3) Crop- chemical digestion of food
(4) Gastric Caeca- digestive juice
Gastric Caecae of cockroach is
(1) Secrete digestive juice
(2) 10-12 blind tubules
(3) Present at the junction of midgut and hindgut-
(4) More than one option is correct
Hindgut in cockroach is
(1) Broader than midgut
(2) Has two parts ileum and rectum
(3) Rectum opens into blind sac
(4) More than one option is correct
Six highly chitinous plate-like teeth are found in ............... of cockroach.
1. Mandible
2. gizzard
3. Maxilla
4. rectum
Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth:
| 1. | Pharynx → Oesophagus → Ileum → Crop → Gizzard → Colon → Rectum |
| 2. | Pharynx → Oesophagus → Crop → Gizzard → Ileum → Colon → Rectum |
| 3. | Pharynx → Oesophagus → Gizzard → Crop → Ileum → Colon → Rectum |
| 4. | Pharynx → Oesophagus → Gizzard → Ileum → Crop → Colon → Rectum |
One very special feature in earthworm (Pheretima) is that –
1. Fertilisation for eggs occurs inside the body
2. The typhlosole greatly increases the effective absorption area of the digested food in the intestine
3. The S- shaped setae embedded in the integument are the defensive weapons used against the enemies
4. It has a long dorsal tubular heart
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