I: | the head is represented by sub-oesophageal ganglion. |
II: | the nerve cord is located on the dorsal side of the body. |
Consider the given two statements:
I: | The vision in cockroach can be best described as a mosaic vision. |
II: | This is a nocturnal vision with more sensitivity but less resolution. |
1. Both I and II are correct and II explains I
2. Both I and II are correct but II does not explain I
3. Both I and II are incorrect
4. II is incorrect and I is correct
1. | Paurometabolous with nymph moulting about 13 times to reach the adult form and the next to last nymphal stage has wing pads. |
2. | Paurometabolous with nymph moulting about 13 times to reach the adult form and the next to last nymphal stage has wings. |
3. | Holometabolous with nymph moulting about 13 times to reach the adult form and the next to last nymphal stage has wing pads. |
4. | Holometabolous with nymph moulting about 13 times to reach the adult form and the next to last nymphal stage has wings. |
I: | Malpighian tubules are lined by glandular and ciliated cells. |
II: | Uric acid is the nitrogenous metabolic excretory product. |
III: | Fat body, nephrocytes and urecose glands also help in excretion. |
1. | Only II is correct |
2. | Only I and II are correct |
3. | Only II and III are correct |
4. | I, II and III are correct |
1. | It is of open type. |
2. | It delivers oxygen to the tissues. |
3. | Heart lies along the mid dorsal line of thorax and abdomen. |
4. | The haemolymph is composed of colourless plasma and haemocytes. |
I: | Malpighian tubules are used in osmoregulation and excretion in cockroach. |
II: | Malpighian tubules are present at the junction of the midgut and the hindgut in the alimentary canal of cockroach. |
1. | Only I is correct |
2. | Only II is correct |
3. | Both I and II are correct |
4. | Both I and II are incorrect |
Consider the given statements:
I: | The crop in the alimentary canal of cockroach is also known as proventriculus, has six highly chitinous plates called teeth and helps in grinding food particles. |
II: | The gizzard is sac-like structure used for storing food in cockroach. |
1. | Only I is correct |
2. | Only II is correct |
3. | Both I and II are correct |
4. | Both I and II are incorrect |
Statement I: | Each thoracic segment in cockroach bears a pair of walking legs. |
Statement II: | The first pair of wings arises from prothorax and they are called as tegmina. |
Statement I: | The head of cockroach is at right angle to the longitudinal body axis. |
Statement II: | The head of cockroach is formed by the fusion of six segments. |
1. | dry surface of the skin |
2. | moist surface of buccal cavity |
3. | inner lining of ducts of salivary glands and pancreatic ducts |
4. | lining of stomach and small intestine |