Q. No.Mark the Incorrect statement
1.
Malpighian tubules of cockroach help in excretion
2.
Fat bodies of cockroach do not help in excretion
3.
Nephrocytes help in excretion
4.
Cockroach has 13 chambered tubular and dorsal heart
In male cockroach, anal styles arise from
| 1. | 7th abdominal segment |
| 2. | 9th abdominal segment |
| 3. | 10th abdominal segment |
| 4. | 4th & 5th abdominal segment |
Mark the statement that is incorrect for central nervous system of cockroach
| 1. | In the head region, the brain is represented by Supraesophageal ganglia which supply nerves to antennae and compound eyes |
| 2. | If the head of the cockroach is cut off, it will die immediately as the head holds a large part of the nervous system |
| 3. | The sub oesophageal ganglion supplies nerves to labium, maxilla and mandibles |
| 4. | Double ventral nerve cord of cockroach contains three thoracic and six abdominal ganglia |
Digestive system of cockroach is not characterised by
| 1. | A muscular gizzard provided with six cuticular teeth in armarium |
| 2. | Presence of twenty blind glandular hepatic caeca at posterior end of mesenteron |
| 3. | Presence of six rectal papillae helping in absorption of water and salts |
| 4. | Presence of cuticular lining in foregut and hind gut |
Following are four statements A to D. Choose the option which includes a set of correct statements
| A. | In Periplaneta, males bear a pair of short, thread like anal styles which are absent in females |
| B. | In both sexes of Periplaneta, the 10th segment bears a pair of jointed filamentous structures called anal cerci |
| C. | In cockroach mesothoracic wings (fore wings) are transparent, membranous and are used in flight |
| D. | In female cockroach, there is a pair of mushroom glands |
Options:
1. A & C
2. B & C
3. A & B
4. C & D
The following diagram shows blood vascular system of cockroach with certain labelled parts a, b & c. Which of the following statements is/are incorrect regarding this system?
| A. | The blood vascular system of cockroach is of open type with well developed blood vessels which open into space (haemocoel). |
| B. | The haemolymph is composed of colourless plasma and haemocytes. |
| C. | The labelled part 'a' represents anterior aorta emerging from first chamber of heart bearing ostia on either side. |
1. C only
2. B & C
3. A only
4. All of the above statements are correct
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. |
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
Given below is a diagrammatic representation of alimentary canal of cockroach.
Choose the option which is not correct with respect to the function of labelled structure A, B, C and D
| 1. | Oesophagus opens into a sac like structure labelled as A used for storing of food. |
| 2. | B helps in grinding of food because it have an outer thick cuticular layer and inner muscular layer. |
| 3. | C is present at the junction of foregut and midgut and secretes digestive juice. |
| 4. | D helps in removal of excretory product from haemolymph. |
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 |
Which of the following statements is incorrect w.rt. cockroach?
| 1. | In both sexes, the 10th segment of abdomen bears a pair of jointed filamentous structures called anal cerci. |
| 2. | Hind wings are transparent and are used in flight. |
| 3. | Gizzard has inner layer of thick circular muscles and thick outer layer of cuticle which forms six chitinous plates called teeth. |
| 4. | Haemolymph is composed of colourless plasma and haemocytes. |
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