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. |
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. |
1. | 100 to 200 | 2. | 750 to 1250 |
3. | 2500 to 3000 | 4. | 8000 to 10000 |
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 |
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. |
I: | lack eyelids and limbs |
II: | have cartilaginous skeletons |
III: | use gills for respiration |
IV: | have tails |
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. |
1. | 20 | 2. | 500 |
3. | 1000 | 4. | 3000 |
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. |