Q. No.Ventricle of frog contains:
(1) oxygenated blood
(2) deoxygenated blood
(3) no blood
(4) mixed blood
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
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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