Match the following cell structure with its characteristic feature:

Column I		Column II
(a)	Tight junctions	(i)	Cement neighboring cells together to form 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?

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

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

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

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.

Find the incorrect match
1. Bufo- Toad
2. Rana- Frog
3. Hyla- Tree frog
4. Rana- Common toad

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