Q. No.In frog, the surface of attachment of tongue is
1. sphenoid
2. palatine
3. pterygoid
4. hyoid apparatus
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.
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 case of frog, after the completion of second cleavage
1. Four blastomeres are formed
2. Two micromeres and two megameres are formed
3. Stereoblastula is formed
4. Discoblastula is formed
Daughter cells formed after second cleavage in frog are termed as
1. Micromeres
2. Megameres
3. Micromeres and megameres
4. Blastomeres
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. |
| 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 |
Codes:
| A | B | C | D | |
| 1. | P | R | X | W |
| 2. | P | R | U | X |
| 3. | R | P | T | X |
| 4. | Q | S | T | W |
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