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Q. No. On land, a frog respires by
1. Skin only
2. Skin and buccal cavity only
3. Skin, lungs and buccal cavity
4. Lungs only
Subtopic: Frogs: Anatomy (Respiratory System) |
87%
From NCERT
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A male frog can be distinguished externally from a female frog by all of the following features except
a. Presence of sound producing vocal sacs
b. Presence of copulatory pad on the first digit of the forelimbs
c. Ureters carry both sperms and urine in male frog
d. Testes are adhered to the upper part of kidneys by a double fold of peritoneum called mesorchium
1. a , b, c and d
2. a and b only
3. a , b and c only
4. c and d only
a. Presence of sound producing vocal sacs
b. Presence of copulatory pad on the first digit of the forelimbs
c. Ureters carry both sperms and urine in male frog
d. Testes are adhered to the upper part of kidneys by a double fold of peritoneum called mesorchium
1. a , b, c and d
2. a and b only
3. a , b and c only
4. c and d only
Subtopic: Frogs: Morphology | Frogs: Anatomy (Excretory System) | Frogs: Anatomy (Male Reproductive System) | Frogs: Anatomy (Female Reproductive System) |
From NCERT
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Which of the following structure acts as urinogenital duct in male frogs ?
1. Urethra
2. Ureter
3. Urinary bladder
4. Vasa efferentia
1. Urethra
2. Ureter
3. Urinary bladder
4. Vasa efferentia
Subtopic: Frogs: Anatomy (Excretory System) |
73%
From NCERT
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Adult frog (Rana tigrina) cannot respire through
1. Moist skin
2. Lungs
3. Gills
4. Buccal cavity
Subtopic: Frogs: Anatomy (Respiratory System) |
85%
From NCERT
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Which of the following statement is incorrect regarding a frog?
1. Digestive system without salivary gland
2. Respiratory system without intercostal muscles
3. Circulatory system without SA node.
4. Reproductive system without copulatory organs.
Subtopic: Frogs: Anatomy (Circulatory System) |
From NCERT
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Match each item in Column I with one in Column II and select the correct match from the codes given:
Codes:
| 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 |
Subtopic: Frogs |
80%
From NCERT
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Regarding frogs:
Statement I: They have the ability to change the colour to hide them from their enemies (camouflage).
Statement II: They undergo summer sleep called as hibernation as well as winter sleep called as aestivation.
1. Only Statement II is correct
2. Only Statement I is correct
3. Both Statement I and Statement II are incorrect.
4. Both Statement I and Statement II are correct.
Statement I: They have the ability to change the colour to hide them from their enemies (camouflage).
Statement II: They undergo summer sleep called as hibernation as well as winter sleep called as aestivation.
1. Only Statement II is correct
2. Only Statement I is correct
3. Both Statement I and Statement II are incorrect.
4. Both Statement I and Statement II are correct.
Subtopic: Frogs |
74%
From NCERT
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Assertion (A): The alimentary canal of a frog is short.
Reason (R): Frog is carnivorous.
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. Both (A) and (R) are false.
Reason (R): Frog is carnivorous.
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. Both (A) and (R) are false.
Subtopic: Frogs |
94%
From NCERT
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Assertion (A): The digits for forelimbs of a frog possess a web.
Reason (R): The webs found in the digits of forelimbs help in swimming.
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. Both (A) and (R) are false.
Reason (R): The webs found in the digits of forelimbs help in swimming.
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. Both (A) and (R) are false.
Subtopic: Frogs |
From NCERT
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Assertion (A): Frogs are considered important for mankind.
Reason (R): They eat insects and protect the crops.
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.
Reason (R): They eat insects and protect the crops.
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.
Subtopic: Frogs |
93%
From NCERT
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