Question 1. In multicellular animals, a group of similar cells along with intercellular substances perform a specific function. Such an organisation is called a:
(a) Tissue.
(b) Organ.
(c) Organ system.
(d) Cell colony.
Answer: a.
Question 2. The body of a simple organism like Hydra is made of different types of cells and the number of cells in each type can be in:
(a) Hundreds.
(b) Thousands.
(c) Millions.
(d) Billions.
Answer: b.
Question 3. All complex animals consist of how many basic types of tissues?
(a) Two.
(b) Three.
(c) Four.
(d) Five.
Answer: c.
Question 4. When two or more organs perform a common function by their physical and/or chemical interaction, they together form an:
(a) Tissue system.
(b) Organ system.
(c) Organism.
(d) Cellular level.
Answer: b.
Question 5. The discernible trend displayed by the complexity in organ and organ systems is called:
(a) Physiological trend.
(b) Evolutionary trend.
(c) Anatomical trend.
(d) Morphological trend.
Answer: b.
Question 6. In the case of animals, the study of the external appearance of the organs or parts of the body is referred to as:
(a) Anatomy.
(b) Physiology.
(c) Morphology.
(d) Histology.
Answer: c.
Question 7. The study of morphology of internal organs in animals is conventionally termed as:
(a) Anatomy.
(b) Taxidermy.
(c) Cytology.
(d) Exomorphology.
Answer: a.
Question 8. The most common species of frog found in India is:
(a) Rana catesbeiana.
(b) Rana tigrina.
(c) Bufo melanostictus.
(d) Hyla arborea.
Answer: b.
Question 9. Frogs do not have a constant body temperature. Such animals are called:
(a) Homeotherms.
(b) Poikilotherms.
(c) Endotherms.
(d) Warm-blooded.
Answer: b.
Question 10. The ability of frogs to change their colour to hide from their enemies is known as:
(a) Hibernation.
(b) Aestivation.
(c) Camouflage.
(d) Mimicry.
Answer: c.
Question 11. The protective coloration exhibited by frogs to hide from predators is specifically called:
(a) Mimicry.
(b) Hibernation.
(c) Adaptation.
(d) Aestivation.
Answer: a.
Question 12. Frogs take shelter in deep burrows to protect themselves from extreme heat during peak summer. This is known as:
(a) Hibernation.
(b) Aestivation.
(c) Diapause.
(d) Encystment.
Answer: b.
Question 13. The winter sleep undertaken by frogs to protect themselves from extreme cold is called:
(a) Aestivation.
(b) Hibernation.
(c) Slumber.
(d) Torpor.
Answer: b.
Question 14. The skin of a frog is smooth and slippery due to the presence of:
(a) Scales.
(b) Feathers.
(c) Mucus.
(d) Sweat glands.
Answer: c.
Question 15. The colour of the dorsal side of a frog's body is generally:
(a) Uniformly pale yellow.
(b) Olive green with dark irregular spots.
(c) Dark brown with yellow bands.
(d) Pitch black with white spots.
Answer: b.
Question 16. On the ventral side, the skin of a frog is uniformly:
(a) Pale yellow.
(b) Dark green.
(c) Pure white.
(d) Olive green.
Answer: a.
Question 17. How does a frog fulfill its water requirements?
(a) By drinking water through its mouth.
(b) By absorbing water through its skin.
(c) By extracting water from its prey.
(d) By storing water in special pouches.
Answer: b.
Question 18. The body of a frog is divisible into:
(a) Head, neck and trunk.
(b) Head, trunk and tail.
(c) Head and trunk.
(d) Head, thorax and abdomen.
Answer: c.
Question 19. Which of the following structures are absent in a frog's body?
(a) Head and trunk.
(b) Neck and tail.
(c) Eyes and tympanum.
(d) Forelimbs and hind limbs.
Answer: b.
Question 20. The eyes of a frog are bulged and covered by a specific membrane that protects them while in water. This is the:
(a) Tympanic membrane.
(b) Nictitating membrane.
(c) Conjunctiva.
(d) Sclera.
Answer: b.
Question 21. In frogs, the membranous structure that receives sound signals on either side of the eyes is the:
(a) Pinna.
(b) Cochlea.
(c) Tympanum.
(d) Vocal sac.
Answer: c.
Question 22. The hind limbs of a frog end in how many digits?
(a) Three.
(b) Four.
(c) Five.
(d) Six.
Answer: c.
Question 23. The forelimbs of a frog end in how many digits?
(a) Three.
(b) Four.
(c) Five.
(d) Six.
Answer: b.
Question 24. Which limbs in a frog are larger and more muscular, aiding in leaping?
(a) Forelimbs.
(b) Hind limbs.
(c) Both are equal in size.
(d) Neither are muscular.
Answer: b.
Question 25. The presence of webbed digits in frogs primarily helps in:
(a) Burrowing.
(b) Walking.
(c) Swimming.
(d) Leaping.
Answer: c.
Question 26. Male frogs can be distinguished from female frogs by the presence of:
(a) Sound producing vocal sacs.
(b) A copulatory pad on the first digit of the fore limbs.
(c) Both vocal sacs and copulatory pads.
(d) Webbed feet.
Answer: c.
Question 27. The copulatory pad in male frogs is present on the:
(a) First digit of the hind limbs.
(b) First digit of the fore limbs.
(c) Second digit of the fore limbs.
(d) Web of the hind limbs.
Answer: b.
Question 28. The alimentary canal of a frog is short because:
(a) They are herbivores.
(b) They are carnivores.
(c) They are omnivores.
(d) They do not consume solid food.
Answer: b.
Question 29. The mouth of a frog opens into the buccal cavity that leads to the oesophagus through the:
(a) Larynx.
(b) Trachea.
(c) Pharynx.
(d) Cloaca.
Answer: c.
Question 30. In the frog's digestive system, bile is secreted by the:
(a) Gall bladder.
(b) Pancreas.
(c) Liver.
(d) Stomach.
Answer: c.
Question 31. The bile secreted by the liver in a frog is stored in the:
(a) Duodenum.
(b) Pancreas.
(c) Gall bladder.
(d) Rectum.
Answer: c.
Question 32. In a frog, the tongue used for capturing food is:
(a) Unilobed.
(b) Bilobed.
(c) Trilobed.
(d) Not lobed.
Answer: b.
Question 33. Digestion of food in the frog's stomach takes place by the action of:
(a) Bile and pancreatic juice.
(b) HCl and gastric juices.
(c) Amylase and lipase.
(d) Saliva and mucus.
Answer: b.
Question 34. The partially digested food passed from the stomach to the duodenum in a frog is called:
(a) Bolus.
(b) Chyme.
(c) Chyle.
(d) Faeces.
Answer: b.
Question 35. The first part of the small intestine in a frog is called the:
(a) Jejunum.
(b) Ileum.
(c) Duodenum.
(d) Rectum.
Answer: c.
Question 36. In a frog, the duodenum receives bile and pancreatic juices through a:
(a) Hepatic duct.
(b) Cystic duct.
(c) Common bile duct.
(d) Pancreatic duct.
Answer: c.
Question 37. The primary function of bile in a frog's digestion is to:
(a) Digest proteins.
(b) Digest carbohydrates.
(c) Emulsify fat.
(d) Absorb water.
Answer: c.
Question 38. In a frog, pancreatic juices digest:
(a) Fats only.
(b) Carbohydrates and proteins.
(c) Vitamins and minerals.
(d) Only proteins.
Answer: b.
Question 39. The digested food in a frog is absorbed by numerous finger-like folds in the inner wall of the intestine called:
(a) Rugae.
(b) Villi and microvilli.
(c) Cilia.
(d) Flagella.
Answer: b.
Question 40. In frogs, the undigested solid waste passes out through the:
(a) Anus.
(b) Urethra.
(c) Cloaca.
(d) Vagina.
Answer: c.
Question 41. In water, the frog respires primarily through its:
(a) Gills.
(b) Lungs.
(c) Skin.
(d) Buccal cavity.
Answer: c.
Question 42. Respiration through the skin in aquatic environments is known as:
(a) Pulmonary respiration.
(b) Branchial respiration.
(c) Cutaneous respiration.
(d) Tracheal respiration.
Answer: c.
Question 43. On land, the respiratory organs of a frog include the:
(a) Skin only.
(b) Lungs only.
(c) Buccal cavity, skin and lungs.
(d) Gills and lungs.
Answer: c.
Question 44. The respiration by lungs in frogs is specifically called:
(a) Cutaneous respiration.
(b) Pulmonary respiration.
(c) Buccal respiration.
(d) Branchial respiration.
Answer: b.
Question 45. During aestivation and hibernation, gaseous exchange in a frog takes place exclusively through the:
(a) Lungs.
(b) Buccal cavity.
(c) Skin.
(d) Nostrils.
Answer: c.
Question 46. The vascular system of a frog is of which type?
(a) Open type.
(b) Closed type.
(c) Partially open type.
(d) Water vascular system.
Answer: b.
Question 47. The frog's heart is a muscular structure with how many chambers?
(a) Two.
(b) Three.
(c) Four.
(d) Five.
Answer: b.
Question 48. The three chambers of a frog's heart consist of:
(a) Two ventricles and one atrium.
(b) Two atria and one ventricle.
(c) One atrium, one ventricle, one sinus venosus.
(d) Two atria and a conus arteriosus.
Answer: b.
Question 49. The heart of a frog is covered by a protective membrane called the:
(a) Pleura.
(b) Peritoneum.
(c) Pericardium.
(d) Meninges.
Answer: c.
Question 50. A triangular structure that joins the right atrium of a frog's heart is called the:
(a) Conus arteriosus.
(b) Sinus venosus.
(c) Truncus arteriosus.
(d) Foramen ovale.
Answer: b.
Question 51. The ventricle of a frog's heart opens into a saclike structure on the ventral side known as:
(a) Sinus venosus.
(b) Conus arteriosus.
(c) Vena cava.
(d) Aorta.
Answer: b.
Question 52. The special venous connection between the liver and intestine in a frog is called the:
(a) Renal portal system.
(b) Hepatic portal system.
(c) Hypophyseal portal system.
(d) Pulmonary system.
Answer: b.
Question 53. The special venous connection between the kidney and lower parts of the body in a frog is the:
(a) Hepatic portal system.
(b) Renal portal system.
(c) Lymphatic system.
(d) Enteric system.
Answer: b.
Question 54. Which of the following is true about frog Red Blood Cells (RBCs)?
(a) They are enucleated and lack haemoglobin.
(b) They are nucleated and contain haemoglobin.
(c) They are enucleated and contain haemoglobin.
(d) They are nucleated but lack haemoglobin.
Answer: b.
Question 55. Lymph in frogs is different from blood because it lacks:
(a) WBCs and plasma.
(b) Few proteins and RBCs.
(c) Water and dissolved gases.
(d) Platelets and WBCs.
Answer: b.
Question 56. The excretory system of a frog consists of a pair of compact, dark red, bean-like structures called:
(a) Testes.
(b) Ovaries.
(c) Kidneys.
(d) Lungs.
Answer: c.
Question 57. The structural and functional units of the frog's kidney are called:
(a) Neurons.
(b) Nephrons or uriniferous tubules.
(c) Alveoli.
(d) Malpighian tubules.
Answer: b.
Question 58. In male frogs, the ureters act as:
(a) Digestive ducts.
(b) Excretory ducts only.
(c) Urinogenital ducts.
(d) Sperm ducts only.
Answer: c.
Question 59. In female frogs, the ureters and oviduct open:
(a) Together into the rectum.
(b) Separately into the cloaca.
(c) Separately into the urinary bladder.
(d) Together into the urinogenital tract.
Answer: b.
Question 60. The thin-walled urinary bladder in a frog is located:
(a) Dorsal to the rectum.
(b) Ventral to the rectum.
(c) Lateral to the kidneys.
(d) Anterior to the liver.
Answer: b.
Question 61. Based on its excretory waste, the frog is classified as a:
(a) Ammonotelic animal.
(b) Uricotelic animal.
(c) Ureotelic animal.
(d) Aminotelic animal.
Answer: c.
Question 62. Chemical coordination of various organs in a frog is achieved by:
(a) Nerves.
(b) Hormones.
(c) Enzymes.
(d) Blood cells.
Answer: b.
Question 63. The nervous system of a frog is organised into:
(a) Only central nervous system.
(b) Central and peripheral nervous systems only.
(c) Central, peripheral and autonomic nervous systems.
(d) Autonomic nervous system only.
Answer: c.
Question 64. How many pairs of cranial nerves arise from the brain of a frog?
(a) Ten pairs.
(b) Twelve pairs.
(c) Eight pairs.
(d) Fourteen pairs.
Answer: a.
Question 65. The brain of a frog is enclosed in a bony structure called the:
(a) Vertebral column.
(b) Sternum.
(c) Cranium (brain box).
(d) Pelvic girdle.
Answer: c.
Question 66. The forebrain of a frog includes:
(a) Olfactory lobes, cerebral hemispheres and diencephalon.
(b) Optic lobes and cerebellum.
(c) Medulla oblongata and diencephalon.
(d) Cerebellum and olfactory lobes.
Answer: a.
Question 67. The midbrain of a frog is characterized by a pair of:
(a) Olfactory lobes.
(b) Optic lobes.
(c) Cerebral hemispheres.
(d) Temporal lobes.
Answer: b.
Question 68. The hind-brain of a frog consists of:
(a) Olfactory lobes and diencephalon.
(b) Cerebrum and optic lobes.
(c) Cerebellum and medulla oblongata.
(d) Cerebrum and medulla oblongata.
Answer: c.
Question 69. In a frog, the medulla oblongata passes out through the foramen magnum and continues into the:
(a) Optic nerve.
(b) Spinal cord.
(c) Cranial nerve.
(d) Sympathetic cord.
Answer: b.
Question 70. In a frog, the organs of touch are sensory papillae, while the organs of taste are:
(a) Taste buds.
(b) Nasal epithelium.
(c) Tympanum.
(d) Ommatidia.
Answer: a.
Question 71. Out of the different sense organs in a frog, which are well-organised structures rather than just cellular aggregations?
(a) Organs of touch and taste.
(b) Organs of smell and touch.
(c) Eyes and internal ears.
(d) Sensory papillae and taste buds.
Answer: c.
Question 72. The eyes of a frog are simple eyes. This means they possess:
(a) Multiple units.
(b) Only one unit.
(c) No lenses.
(d) Compound lenses.
Answer: b.
Question 73. In a frog, the ear is an organ for hearing as well as for:
(a) Thermoregulation.
(b) Balancing (equilibrium).
(c) Respiration.
(d) Excretion.
Answer: b.
Question 74. The male reproductive organs of a frog consist of a pair of yellowish ovoid testes adhered to the upper part of kidneys by a double fold of peritoneum called:
(a) Mesovarium.
(b) Mesorchium.
(c) Pericardium.
(d) Pleura.
Answer: b.
Question 75. How many vasa efferentia arise from the testes of a male frog?
(a) 5-6.
(b) 10-12.
(c) 15-20.
(d) 2-4.
Answer: b.
Question 76. The vasa efferentia enter the frog's kidneys and open into the:
(a) Loop of Henle.
(b) Bowman's capsule.
(c) Bidder's canal.
(d) Ureter.
Answer: c.
Question 77. In a male frog, the structure that communicates with the urinogenital duct which finally opens into the cloaca is the:
(a) Fallopian tube.
(b) Bidder's canal.
(c) Prostate gland.
(d) Seminal vesicle.
Answer: b.
Question 78. In a frog, the cloaca is a small, median chamber used to pass:
(a) Only faecal matter.
(b) Only urine.
(c) Only sperms.
(d) Faecal matter, urine and sperms.
Answer: d.
Question 79. The female reproductive organs of a frog include a pair of ovaries situated near the kidneys. What is their functional connection with the kidneys?
(a) They share a common duct.
(b) Ovaries open into Bidder's canal.
(c) There is no functional connection.
(d) They drain into the renal pelvis.
Answer: c.
Question 80. A mature female frog can lay how many ova at a time?
(a) 500 to 1000.
(b) 1000 to 1500.
(c) 2500 to 3000.
(d) 5000 to 10000.
Answer: c.
Question 81. Fertilisation in frogs is:
(a) Internal and takes place in water.
(b) External and takes place in water.
(c) Internal and takes place on land.
(d) External and takes place on land.
Answer: b.
Question 82. The development of a frog involves a larval stage known as a:
(a) Caterpillar.
(b) Nymph.
(c) Tadpole.
(d) Maggot.
Answer: c.
Question 83. The process by which a tadpole transforms into an adult frog is called:
(a) Metagenesis.
(b) Metamorphosis.
(c) Parthenogenesis.
(d) Morphallaxis.
Answer: b.
Question 84. Frogs are beneficial for mankind primarily because they:
(a) Provide a source of milk.
(b) Eat insects and protect crops.
(c) Can be used to extract venom.
(d) Aerate the soil by burrowing.
Answer: b.
Question 85. The circulatory system of a frog is characterized by:
(a) Single circulation and open type.
(b) Double circulation and closed type.
(c) Closed type with single circulation.
(d) Open type with double circulation.
Answer: c.
Question 86. Assertion: The alimentary canal of frogs is short. Reason: Frogs are carnivores and hence the length of the intestine is reduced.
(a) Both Assertion and Reason are correct and Reason is the correct explanation.
(b) Both Assertion and Reason are correct but Reason is not the correct explanation.
(c) Assertion is correct but Reason is incorrect.
(d) Both Assertion and Reason are incorrect.
Answer: a.
Question 87. Assertion: Frogs exhibit sexual dimorphism. Reason: Male frogs have vocal sacs and a copulatory pad on the first digit of forelimbs.
(a) Both Assertion and Reason are correct and Reason is the correct explanation.
(b) Both Assertion and Reason are correct but Reason is not the correct explanation.
(c) Assertion is correct but Reason is incorrect.
(d) Both Assertion and Reason are incorrect.
Answer: a.
Question 88. Assertion: During aestivation, frogs respire through lungs. Reason: Lungs are highly efficient during extreme heat conditions.
(a) Both Assertion and Reason are correct and Reason is the correct explanation.
(b) Both Assertion and Reason are correct but Reason is not the correct explanation.
(c) Assertion is correct but Reason is incorrect.
(d) Both Assertion and Reason are incorrect.
Answer: d.
Question 89. Statement I: The skin of a frog is always maintained in a moist condition. Statement II: The frog never drinks water but absorbs it through the skin.
(a) Both Statement I and Statement II are correct.
(b) Both Statement I and Statement II are incorrect.
(c) Statement I is correct but Statement II is incorrect.
(d) Statement I is incorrect but Statement II is correct.
Answer: a.
Question 90. Match the following regarding the frog's nervous system: (A) Forebrain (B) Midbrain (C) Hindbrain. (1) Optic lobes (2) Cerebellum (3) Olfactory lobes.
(a) A-3, B-1, C-2.
(b) A-1, B-2, C-3.
(c) A-2, B-3, C-1.
(d) A-3, B-2, C-1.
Answer: a.
Question 91. In frogs, the common bile duct receives secretions from:
(a) Gall bladder only.
(b) Pancreas only.
(c) Gall bladder and Pancreas.
(d) Liver and Spleen.
Answer: c.
Question 92. Identify the incorrect statement regarding the frog's reproductive system:
(a) Male reproductive organs consist of a pair of testes.
(b) Ovaries have a direct functional connection with kidneys.
(c) Vasa efferentia are 10-12 in number.
(d) Fertilisation is external in frogs.
Answer: b.
Question 93. The special venous connection present in frogs between the kidney and the lower parts of the body is referred to as the:
(a) Hypophyseal portal system.
(b) Renal portal system.
(c) Hepatic portal system.
(d) Pulmocutaneous system.
Answer: b.
Question 94. During pulmonary respiration in frogs, air enters through the nostrils into the:
(a) Trachea directly.
(b) Buccal cavity and then to lungs.
(c) Pharynx directly.
(d) Bronchi.
Answer: b.
Question 95. The lymph in frogs is different from blood because it is primarily devoid of:
(a) White blood cells.
(b) Water.
(c) Red blood cells and a few proteins.
(d) Hormones.
Answer: c.
Question 96. Which structure in the frog's brain passes out through the foramen magnum to continue as the spinal cord?
(a) Cerebrum.
(b) Cerebellum.
(c) Medulla oblongata.
(d) Diencephalon.
Answer: c.
Question 97. Identify the correct path of sperm transport in a male frog:
(a) Testes -> Vasa efferentia -> Kidney -> Bidder's canal -> Urinogenital duct -> Cloaca.
(b) Testes -> Bidder's canal -> Vasa efferentia -> Urinogenital duct -> Cloaca.
(c) Testes -> Vasa efferentia -> Urinogenital duct -> Bidder's canal -> Cloaca.
(d) Testes -> Urinogenital duct -> Kidney -> Bidder's canal -> Cloaca.
Answer: a.
Question 98. Statement I: Frogs have external ears visible on the sides of their head. Statement II: Tympanum represents the ear and helps in receiving sound signals.
(a) Both statements are correct.
(b) Statement I is correct but Statement II is incorrect.
(c) Statement I is incorrect but Statement II is correct.
(d) Both statements are incorrect.
Answer: c.
Question 99. The sensory organs of smell in a frog are represented by:
(a) Taste buds.
(b) Sensory papillae.
(c) Nasal epithelium.
(d) Tympanum.
Answer: c.
Question 100. In a frog, the digestive enzyme that emulsifies fat is secreted by the:
(a) Pancreas.
(b) Liver.
(c) Stomach.
(d) Intestine.
Answer: b.
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