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Q. No.The opening in the skull of the frog through which the medulla oblongata passes out and continues into the spinal cord is called as:
1.
Foramen ovale
2.
Foramen spinosum
3.
Foramen magnum
4.
Obturator foramen
Subtopic: Frogs: Anatomy (Nervous System) |
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Which of the following sense organs in frogs are well-organised structures rather than cellular aggregations around nerve endings?
| I: | Sensory papillae for touch |
| II: | Taste buds |
| III: | Nasal epithelium |
| IV: | Eyes |
| V: | Tympanum with internal ears |
| 1. | Only I, II and III | 2. | Only IV and V |
| 3. | Only II, IV and V | 4. | Only IV |
Subtopic: Frogs: Anatomy (Nervous System) |
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Eyes in a frog:
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: | are situated in the orbit in skull. |
| II: | are compound eyes possessing a large number of units. |
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
Subtopic: Frogs: Anatomy (Nervous System) |
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Regarding ear in frog:
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
| I: | External ear is absent. |
| II: | Only tympanum can be seen externally. |
| III: | The ear is an organ of hearing but not of balancing (equilibrium). |
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 (Nervous System) |
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In frogs, vasa efferentia:
| I: | are 100-120 in number that arise from testes |
| II: | enter the kidneys on their side and open into Bidder’s canal |
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 (Male Reproductive System) |
74%
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Trace the correct path of passage of the sperm in male Rana tigrina:
| 1. | Testes → Vasa efferentia → Kidney → Seminal vesicle → Urogenital duct → Cloaca |
| 2. | Testes → Vasa efferentia → Bidder’s canal → Ureter → Cloaca |
| 3. | Testes → Vasa efferentia → Kidney → Bidder’s canal → Urogenital duct → Cloaca |
| 4. | Testes → Bidder’s canal → Kidney → Vasa efferentia → Urogenital duct → Cloaca |
Subtopic: Frogs: Anatomy (Male Reproductive System) |
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The cloaca in a frog is a small, median chamber that is used to pass:
| 1. | only faecal matter to the exterior. |
| 2. | only faecal matter and urine but not sperms to the exterior. |
| 3. | faecal matter, urine and sperms to the exterior. |
| 4. | faecal matter and sperms but not urine to the exterior. |
Subtopic: Frogs: Anatomy (Excretory System) |
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Mesorchium in frogs:
| 1. | is a double fold of peritoneum that adheres testes to kidney. |
| 2. | is a double fold of peritoneum that adheres ovaries to kidney. |
| 3. | is the outer cortical part of testes. |
| 4. | is the outer cortical part of ovaries. |
Subtopic: Frogs: Anatomy (Male Reproductive System) |
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Consider the two statements:
| Statement I: | In male frogs, the testes are found adhered to the upper part of the kidneys and have a functional connection with the kidneys. |
| Statement II: | In female frogs, the ovaries are situated near the kidneys and there is no functional connection with the kidneys. |
| 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 (Male Reproductive System) |
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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) |
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