Assertion (A): | Frogs help maintain ecological balance. |
Reason (R): | The species which maintain ecological balance serve as an important link in the food chain and food web. |
1. | Both (A) and (R) are True and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are True but (R) is not the correct explanation of (A). |
3. | (A) is True but (R) is False. |
4. | (A) is False but (R) is True. |
Column I | Column II | ||
A. | Copulatory pad in male frog | P. | Present on 1st digit of forelimbs |
B. | In hibernation, frog respires | Q. | Present on 1st digit of hind limbs |
C. | Optic lobes in a frog are a part of | R. | Through skin |
D. | Bidder’s canal | S. | Through lungs |
T. | Fore brain | ||
U. | Mid brain | ||
W. | Present in female frog’s kidney for the passage of ova | ||
X. | Present in male frog’s kidney for the passage of sperms |
A | B | C | D | |
1. | P | R | X | W |
2. | P | R | U | X |
3. | R | P | T | X |
4. | Q | S | T | W |
Frogs can protect itself from enemies by
1. Clawed toes
2. Spiny skin
3. Camouflage
4. Sharp teeth
The biological adaptation that allows frogs to obtain water for their survival during conditions of water scarcity is the
1. | presence of a modified tongue that acts like a sponge to suck water from damp soils. |
2. | presence of water channels in the skin by which they absorb water from their surroundings. |
3. | presence of ciliated esophagus that helps in separating water from ingested particulate matter. |
4. | selective feeding on plants with a large amount of water that would fulfill the water requirement. |