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Q. No.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) |
70%
Level 2: 60%+
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A pair of oviducts arising from the ovaries in female frogs:
| 1. | join to form a single median duct that opens into the cloaca. |
| 2. | opens into the cloaca separately. |
| 3. | opens separately to the exterior through the skin. |
| 4. | join to form a single median duct that opens into Bidder’s canal. |
Subtopic: Frogs: Anatomy (Female Reproductive System) |
73%
Level 2: 60%+
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The number of ova that can be laid by a mature female frog at a time varies between:
| 1. | 100 to 200 | 2. | 750 to 1250 |
| 3. | 2500 to 3000 | 4. | 8000 to 10000 |
Subtopic: Frogs: Anatomy (Female Reproductive System) |
93%
Level 1: 80%+
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The figure shows the female reproductive system of a frog. Identify A, B, C and D:
| A | B | C | D | |
| 1. | Ova | Ovary | Ureter | Urinary bladder |
| 2. | Ovary | Oviduct | Ureter | Urinary bladder |
| 3. | Ova | Oviduct | Urethra | Urinary bladder |
| 4. | Ova | Oviduct | Ureter | Cloaca |
Subtopic: Frogs: Anatomy (Female Reproductive System) |
78%
Level 2: 60%+
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In frog:
| 1. | Fertilisation is external, takes place in water while development involves a larval stage called tadpole that undergoes metamorphosis to form the adult. |
| 2. | Fertilisation is internal, takes place inside the female body while development involves a larval stage called tadpole that undergoes metamorphosis to form the adult. |
| 3. | Fertilisation is external, takes place in water while development involves a larval stage called instar that undergoes paurometabolous metamorphosis to form the adult. |
| 4. | Fertilisation is internal, takes place inside the female body while development involves a larval stage called instar that moults 13 times to form the adult. |
Subtopic: Frogs: Anatomy (Female Reproductive System) |
93%
Level 1: 80%+
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The larvae that emerge from the eggs, known as tadpoles:
1. Only I, II and III are correct
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
| I: | lack eyelids and limbs |
| II: | have cartilaginous skeletons |
| III: | use gills for respiration |
| IV: | have tails |
2. Only I, III and IV are correct
3. Only II, III and IV are correct
4. I, II, III and IV are correct
Subtopic: Frogs: Anatomy (Female Reproductive System) |
55%
Level 3: 35%-60%
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Consider the given two statements
| Assertion (A): | The metamorphosis in a frog is not regarded as holometabolous. |
| Reason (R): | Frog metamorphosis does not involve a pupa stage. |
| 1. | Both (A) and (R) are True and (R) correctly explains (A). |
| 2. | Both (A) and (R) are True but (R) does not correctly explain (A). |
| 3. | (A) is True, (R) is False. |
| 4. | (A) is False, (R) is False. |
Subtopic: Frogs: Anatomy (Female Reproductive System) |
53%
Level 3: 35%-60%
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The number of ova, a mature female frog can lay at a time, may reach up to
| 1. | 20 | 2. | 500 |
| 3. | 1000 | 4. | 3000 |
Subtopic: Frogs: Anatomy (Female Reproductive System) |
81%
Level 1: 80%+
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In the reproductive system of female frogs, which of the following statements is true?
| 1. | The oviducts open directly into the coelom. |
| 2. | Females have a single ovary. |
| 3. | Eggs are fertilized internally. |
| 4. | Eggs are laid and fertilized externally in water. |
Subtopic: Frogs: Anatomy (Female Reproductive System) |
87%
Level 1: 80%+
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