Q. No.If the head of cockroach is removed, it may live for few days because:
1.
The cockroach does not have a nervous system.
2.
The head holds a small proportion of a nervous system while the rest is situated along the ventral part of its body.
3.
The head holds a third of the nervous system while the rest is situated along the dorsal part of its body.
4.
The supra-oesophageal ganglia of the cockroach are situated in ventral part of abdomen.
Identify the incorrectly matched pair regarding reproductive structures in Periplaneta americana:
|
|
Structure |
Body segment |
|
1. |
Testes |
4th – 6th abdominal |
|
2. |
Ovaries |
4th – 6th abdominal |
|
3. |
Mushroom gland |
6th – 7th abdominal |
|
4. |
Spermatheca |
6th abdominal |
In Periplaneta americana:
| 1. | malpighian tubules do not play any role in osmoregulation |
| 2. | blood vascular system does not deliver oxygen to the tissues |
| 3. | mosaic vision does not have high sensitivity |
| 4. | the nymph does not grow by moulting |
The main function of adipose tissue is
| 1. | providing insulation from heat and cold |
| 2. | providing protective padding around organs |
| 3. | to be a reserve of lipids |
| 4. | providing feedback for hunger and diet to the brain |
Presence of intercalated discs help cardiac muscles to act as a functional syncytium. This is possible because the structure of these discs have:
| 1. | Tight junctions | 2. | Gap junctions |
| 3. | Adhering junctions | 4. | Plasmodesmata |
Which of the following mouth parts of cockroach are paired?
| 1. | Labrum | 2. | Labium |
| 3. | Hypopharynx | 4. | Maxilla |
Anal styles are borne on the:
| 1. | 9th segment only in female cockroach |
| 2. | 9th segment only in male cockroach |
| 3. | 10th segment only in female cockroach |
| 4. | 10th segment only in male cockroach |
In cockroach, a chitinous hard exoskeleton covers:
1. The head segment only
2. The head and the thorax segment only
3. The thorax and the abdomen only
4. The entire body
What are the structures labeled A, B, C and D respectively in the given diagram?
| 1. | Dendrites, Soma, Axon, Terminal nerve endings |
| 2. | Dendrites, Soma, Cyton, Terminal nerve endings |
| 3. | Terminal nerve endings, Soma, Axon, Dendrites |
| 4. | Terminal nerve endings, Soma, Perikaryon, Dendrites |
What are the structures labelled A, B, C and D respectively, in the given diagram?
| 1. | Mast cell, Fibroblast, Collagen, Macrophage |
| 2. | Mast cell, Dendritic cell, Collagen, Macrophage |
| 3. | Macrophage, Fibroblast, Elastin, Mast cell |
| 4. | Macrophage, Fibroblast, Collagen, Mast cell |
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