Q. No.
What external changes are visible after the last moult of a cockroach nymph?
1. Anal cerci develop
2. Both fore wings and hind wings develop
3. Labium develops
4. Mandibles become harder
2. Both fore wings and hind wings develop
3. Labium develops
4. Mandibles become harder
Compared to those of humans, the erythrocytes in frogs are:
| 1. | Without nucleus but with haemoglobin |
| 2. | Nucleated and with haemoglobin |
| 3. | Very much smaller and fewer |
| 4. | Nucleated and without haemoglobin |
Select the correct statement from the ones given below with respect to Periplaneta americana.
| 1. | Nervous system located dorsally, consists of segmentally arranged ganglia joined by a pair of longitudinal connectives |
| 2. | Males bear a pair of short thread-like anal styles |
| 3. | There are 16 very long Malpighian tubules present at the junctions of midgut and hindgut |
| 4. | Grinding of food is carried out only by the mouth parts |
| 1. | the typhlosole greatly increases the effective absorption area of the digested food in the intestine |
| 2. | the S-shaped setae embedded in the integument are the defensive weapons used against the enemies |
| 3. | it has a long dorsal tubular heart |
| 4. | fertilization of eggs occurs inside the body |
1. bronchioles and fallopian tubes
2. bile duct and oesophagus
3. fallopian tubes and urethra
4. eustachian tube and stomach lining
| 1. | Oxygen is transported by hemoglobin in blood |
| 2. | The nitrogenous excretory product is urea |
| 3. | The food is ground by mandibles and gizzard |
| 4. | Malpighian tubules are excretory organs projecting out from the colon |
The kind of epithelium which forms the inner walls of blood vessels is:
1. cuboidal epithelium
2. columnar epithelium
3. ciliated columnar epithelium
4. squamous epithelium
The epithelial tissue present on the inner surface of bronchioles and fallopian tubes is:
1. cuboidal
2. glandular
3. ciliated
4. squamous
The cell junctions called tight, adhering and gap junctions are found in:
1. muscular tissue
2. connective tissue
3. epithelial tissue
4. neural tissue
The kind of tissue that forms the supportive structure in our pinna (external ears) is also found in:
1. Vertebrae
2. Nails
3. Ear ossicle
4. tip of the nose
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