In Rana tigrina:
a: | The hind limbs end in four digits |
b: | The hind limbs are larger and muscular than fore limbs. |
c: | The fore limbs end in five digits. |
d: | Feet have webbed digits that help in swimming. |
1. Only a and b are correct
2. Only c and d are correct
3. Only a and c are correct
4. Only b and d are correct
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. |
Assertion (A): | The alimentary canal in frogs is short. |
Reason (R): | Frogs are carnivores. |
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. |
1. | Buccal cavity → Pharynx → Oesophagus → Stomach → Intestine → Rectum → Cloaca |
2. | Buccal cavity → Oesophagus → Pharynx → Stomach → Intestine → Rectum → Cloaca |
3. | Buccal cavity → Pharynx → Oesophagus → Stomach → Intestine → Cloaca → Rectum |
4. | Buccal cavity → Oesophagus → Pharynx → Stomach → Intestine → Cloaca → Rectum |
1. | secretes a lot of digestive enzymes. |
2. | does not have digestive function. |
3. | secretes bile that is stored in the gall bladder. |
4. | secretes bile that is not stored as frogs do not have a gall bladder. |
I: | Frog is a herbivore |
II: | Food is captured by the bilobed tongue. |
1. | chyme | 2. | chyle |
3. | succus entericus | 4. | bile |
1. | Stomach | 2. | Duodenum |
3. | Oesophagus | 4. | Pharynx |
I: | Bile emulsifies fat. |
II: | Pancreatic juices digest carbohydrates and proteins. |
III: | Digested food is absorbed by the numerous finger-like folds in the inner wall of intestine called villi and microvilli. |
IV: | The undigested solid waste moves into the rectum and passes out through cloaca. |
I | II | III | IV | |
1. | T | T | F | T |
2. | F | T | T | F |
3. | T | T | T | T |
4. | T | F | F | T |
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 |