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51.

How do you differentiate a frog from a toadA. Frog has no exoskeleton but toad had scalesB. Frog respires through lungs but toad respires through skinC. Frog has a tail but toad has not tailD. Frog has no parotid glands but toad has a pair of parotid glands

Answer» Correct Answer - D
Discussion
52.

Number of spinal nerves in frog isA. Ten onlyB. Ten pairsC. Twelve pairsD. Twenty pairs

Answer» Correct Answer - B
The number of spinal nerves is definite in a particular group of animals. In frog the number is ten pairs.
Discussion
53.

Which part of the brain of frog is called palliumA. Roof of paracoelB. Floor of epicoelC. Roof of rhinocoelD. Roof of metacoel

Answer» Correct Answer - A
Thin roof of cerebrum in frog is called pallium. This term is also used in reference to mantle of a mollusc or brachiopod.
Discussion
54.

The heart of frog beats at the rate ofA. 25 times/min.B. 64 times/minC. 72 times/minD. 100 times/min

Answer» Correct Answer - B
Discussion
55.

The summer sleep of frog is termed asA. NeotenyB. AestivationC. PaedogenesisD. Hibernation

Answer» Correct Answer - B
Discussion
56.

The jaws, eye orbits and nasal chambers in frog are supplied byA. Occipital arteriesB. Vertebral arteriesC. External carotid arteriesD. Internal carotid arteries

Answer» Correct Answer - A
The occipital artery in front supplies jaws, eye orbit and nasal chambers. It is a branch of occipito-vertebral artery.
Discussion
57.

In frog the vein that carries blood from tongue is termedA. LingualB. AzygousC. CutaneousD. Anterior abdominal

Answer» Correct Answer - A
Discussion
58.

Anterior obdominal vein in frog is formed by union ofA. Right and left pelvic veinsB. Rightand left sciatic veinsC. Right and left femoral veinsD. Right and left dorsolumbar veins

Answer» Correct Answer - A
The pelvic veins of both sides unite to form a median ventral or atterior abdominal vein. It receives blood from urinary bladder and ventral abdominal wall.
Discussion
59.

The most important mammalian character of rat isA. HairB. PinnaC. DiaphragmD. Mammary glands

Answer» Correct Answer - D
Most important character of mammals is the presence of mammary glands (modified sweat glands).
Discussion
60.

The second cranial nerve of frog isA. OpticB. VagusC. AuditoryD. Trochlear

Answer» Correct Answer - A
Optic is second cranial nerve of frog, which carries impulse of sight from the eye to the brain and its naure is sensory.
Discussion