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 |
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 |