Q. No.
Assertion (A):
Hibernation during winter and aestivation during summer is seen in frogs.
Reason (R):
Frogs are poikilotherms.
1.
Both A and R are true and R is the correct explanation for A.
2.
Both A and R are true both R is not the correct explanation for A.
3.
A is true and R is false.
4.
A is false and R is true
.
Match column-I and column-II, choose the correct combination from the option given
|
|
Column-I |
|
Column-II |
|
(A) |
Adhering Junctions |
1. |
Help to stop substances from leaking across a tissue |
|
(B) |
Gap junctions |
2. |
Perform cementing to keep neighbouring cells together |
|
(C) |
Tight junctions |
3. |
Facilitate the cells to communicate with each other |
1. (A)-3, (B)-2, (C)-1
2. (A)-2, (B)-3, (C)-1
3. (A)-2, (B)-1,(C)-3
4. (A)-1, (B)-3, (C)-2
One very special feature in earthworm (Pheretima) is that –
| 1. | Fertilisation for eggs occurs inside the body |
| 2. | The typhlosole greatly increases the effective absorption area of the digested food in the intestine |
| 3. | The S- shaped setae embedded in the integument are the defensive weapons used against the enemies |
| 4. | It has a long dorsal tubular heart |
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
Ventricle of frog contains:
| 1. | oxygenated blood | 2. | deoxygenated blood |
| 3. | no blood | 4. | mixed blood |
An animal which contains three-chambered heart is ______________.
1. man
2. rabbit
3. fish
4. frog
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. |
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 |
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) |
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