Q. No.Contraction of sternohyal muscles during breathing in frog
1. Opens glottis
2. Closes glottis
3. Lowers floor of oral cavity
4. Raises floor of oral cavity
1. Opens glottis
2. Closes glottis
3. Lowers floor of oral cavity
4. Raises floor of oral cavity
Which of the following statement is incorrect with respect to Rana tigrina?
1. Muscular tongue is bilobed at tip and free from behind
2. Maxillary teeth are arranged along the margin of upper jaw and lower jaw is toothless
3. Tadpole larva of frog is with comparatively short alimentary canal than adult
4. Tail is present in the life cycle of frog
Match the following cell structure with its characteristic feature:
| Column I | Column II | ||
| (a) | Tight junctions | (i) | Cement neighboring cells together to form a sheet |
| (b) | Adhering junctions | (ii) | Transmit information through chemicals to another cell |
| (c) | Gap junctions | (iii) | Establish a barrier to prevent leakage of fluid across epithelial cells |
| (d) | Synaptic junctions | (iv) | Cytoplasmic channels to facilitate communication between adjacent cells |
Select the correct option from the following:
| Options: | (a) | (b) | (c) | (d) |
| 1. | (ii) | (iv) | (i) | (iii) |
| 2. | (iv) | (ii) | (i) | (iii) |
| 3. | (iii) | (i) | (iv) | (ii) |
| 4. | (iv) | (iii) | (i) | (ii) |
Which of the following statements is INCORRECT?
| 1. | Cockroaches exhibit mosaic vision with less sensitivity and more resolution |
| 2. | A mushroom-shaped gland is present in the 6th-7th abdominal segments of male |
| 3. | A pair of spermatheca is present in the 6th segment of female cockroach |
| 4. | Female cockroach possesses sixteen ovarioles in the ovaries |
In frogs, body proportions do not change with their growth. A frog that is twice as long as another will be heavier by approximately
1. Two-fold
2. Six-fold
3. Four-fold
4. Eight-fold
In a frog leaping frantically to escape a predator, which of the following modes of respiration is likely to occur?
i. Cutaneous
ii. Buccal
iii. Pulmonary
1. i, ii, and iii
2. Only ii and iii
3. Only i and ii
4. Only i and iii
After the rain, tadpoles were found swimming in a pond but not the frogs. This is due to-
A. lack of pituitary hormones.
B. lack of sex hormones.
C. lack of thyroxine
D. lack of iodine in water
Select the correct alternative.
1. A and B
2. A and C
3. C and D
4. A, B, C and D
If we cut the vagus nerve supplying the heart of frog.
the heart rate will
1. Increase.
2. Decrease.
3. No effect on heart rate.
4. First decrease then normalised.
Frogs differ from humans in possessing
1. paired cerebral hemispheres
2. hepatic portal system
3. nucleated red blood cells
4. thyroid as well as parathyroid
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