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Q. No.Frog, when on land, uses which of the following as its respiratory organs?
I:
The buccal cavity
II:
Skin
III:
Lungs
1.
Only I and II
2.
Only I and III
3.
Only II and III
4.
I, II and III
Subtopic: Cockroach: Respiratory System |
81%
From NCERT
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Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R):
In the light of the above statements choose the correct answer from the options given below:
| Assertion (A): | Rana tigrina is cold-blooded or poikilotherm. |
| Reason (R): | Its body temperature varies with the temperature of the environment. |
| 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: Morphology |
89%
From NCERT
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The frog:
| 1. | drinks a lot of water and passes a lot of dilute urine. |
| 2. | drinks only some water and meets its requirements from metabolic water. |
| 3. | drinks only some water and passes a highly concentrated urine |
| 4. | never drinks water but absorbs it through the skin. |
Subtopic: Frogs: Morphology |
94%
From NCERT
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Which of the following statements regarding morphology of frog is not true?
| I: | Above the mouth, a pair of nostrils is present. |
| II: | Eyes are bulged and covered by a nictitating membrane that protects them while on land. |
| III: | On either side of eyes, a membranous tympanum (ear) receives sound signals. |
1. Only II
2. Only II and III
3. Only I
4. None, all statements are correct
Subtopic: Frogs: Morphology |
68%
From NCERT
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Frogs exhibit sexual dimorphism. Male frogs can be distinguished from the females by the presence of:
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| I: | sound producing vocal sacs which are absent in female frogs. |
| II: | a copulatory pad on the first digit of the hind limbs which is absent in female frogs. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Frogs: Anatomy (Male Reproductive System) | Frogs: Anatomy (Female Reproductive System) |
67%
From NCERT
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Frogs respire on land and in water by two different methods:
| Statement I: | In water, skin acts as aquatic respiratory organ (cutaneous respiration). |
| Statement II: | On land, the buccal cavity, skin and lungs act as the respiratory organs. |
| 1. | Statement I is correct, Statement II is correct |
| 2. | Statement I is incorrect, Statement II is correct |
| 3. | Statement I is correct, Statement II is incorrect |
| 4. | Statement I is incorrect, Statement II is incorrect |
Subtopic: Frogs: Anatomy (Respiratory System) |
90%
From NCERT
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The single ventricle in the heart of a frog:
| 1. | opens into a sac-like conus arteriosus on the dorsal side of the heart. |
| 2. | opens into a sac-like conus arteriosus on the ventral side of the heart. |
| 3. | opens into a dilated chamber sinus venosus on the ventral side of the heart. |
| 4. | opens into a dilated chamber sinus venosus on the dorsal side of the heart. |
Subtopic: Frogs: Anatomy (Circulatory System) |
74%
From NCERT
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Sinus venosus in the heart of a frog:
| I: | joins the left atrium |
| II: | pumps blood into the major arteries |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Frogs: Anatomy (Circulatory System) |
54%
From NCERT
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Heart of a frog:
| I: | has three chambers |
| II: | is a muscular pump |
| III: | is covered by pericardium |
1. Only I and II are correct
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
Subtopic: Frogs: Anatomy (Circulatory System) |
89%
From NCERT
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Subtopic: Frogs: Anatomy (Excretory System) |
82%
From NCERT
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