Chordates Solved MCQs – Quiz Questions and Answers

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Chordates Solved MCQs are animals which are either vertebrates or closely related invertebrates. They are connected by having, a notochord, a hollow dorsal nerve cord, pharyngeal slits and a post-anal tail at least some point in their life cycle. These features may only be present in the embryo.

Chordates Solved MCQs With Answers

Phylum Chordates Solved MCQs

1. Body temperature of Lizard when lie on rock is ?

A. 38℃
B. 32℃
C. 36.5℃
D. 37℃

2. Counter current multiplier is the property of ?

A. Birds
B. Reptiles
C. Mammals
D. None

3. parapineal organ is prominent in ?

A. Lizards
B. Birds
C. Sphenodon
D. All

4. Cerebellum is best developed in lizards ?

A. Yes
B. No

5. Loreal pits, heat sensing structure present in ?

A. Python family
B. Anaconda
C. Cobras
D. Viperidae family

6. —– have salt excreting glands in their palate ?

A. Lizards
B. American opossum
C. Sea snakes
D. All

7. Eustachian tube absent in ?

A. Snakes
B. Humans
C. Horses
D. All

8. Courtship in snakes and lizards may involve the use of hormone that ensure that courtship and copulation occurs between same species ?

A. Pheromones
B. Oxytoci
C. Testosterone
D. None of these

9. Form of asexual reproduction present in lizards ?

A. Budding
B. Parthenogenesis
C. Coloning
D. All of these

10. Unlike mammals, the upper jaw of all birds is ?

A. Movable
B. Freely movable
C. Immovable

11. The upper beak in birds is supported by ?

A. Mandible
B. Maxilla
C. Vomer
D. Dentary bones

12. Skull bones in birds are composed of framework of ?

A. Lignin
B. Collagen
C. Keratin
D. Fibrin

13. Flightless birds such as ostrich lacked the keeled sternum ?


14. In birds, pectoral muscles and humerous provides the power of Swimming ?


15. Birds depend on their beaks to preen their feather ?


16. Process of providing and obtaining food necessary for growth and health is called ?

A. Nutrition
B. Excretion
C. Digestion
D. Respiration

17. Mouth of reptiles directly opens into ?

A. Buccal cavity
B. Oesophagus
C. Pharynx
D. Larynx

18. Oesophagus is a muscle and helps food to move into stomach of Reptiles ?

A. Yes
B. No

19. Haemoglobin bearing cells are ?

A. Leukocytes
B. Erythrocytes
C. Thrombocytes
D. All of these

20. In reptiles, colour of plasma is ?

A. Green
B. Red
C. Color less
D. Yellow

21. Cells that assist in clotting are ?

A. Leukocytes
B. Erythrocytes
C. Thrombocytes
D. None of these

22. Few crotaline snakes have green yellow blood ?

A. Yes
B. No

23. Muscular contraction of the ventricles is single phase in ?

A. crocodiles
B. turtles and squamates
C. monitor lizards
D. snakes

24. The opening in the floor of pharynx is known as ?

A. larynx
B. trachea
C. faveoli
D. glottis

25. Pharyngeal gas exchange is particularly well developed in ?

A. soft shelled turtles
B. musk turtles
C. snapping turtles
D. pond sliders

26. The volume of pleura-peritoneal cavity is increased during Exhalation ?

A. yes
B. No

27. Crocodiles have unidirectional air flow in their lungs similareto avian respiratory system ?

A. yes
B. no

28. Afiloplume consists of ?

A. a short calamus and a long rachis
B. a short calamus and lack rachis
C. long calamus and short rachis
D. none of these

29. Which of the following is true for rachis?

A. hollow and tubular
B. inserted into follicle of skin
C. fan like and webbed
D. closely packed mass of pith cells

30. Lungs of reptiles are surrounded by ?

A. intercostal muscles
B. diaphragm
C. peritoneum
D. rib cage

31. Birds have body temperature that range from about…?

A. 40_44F
B. 104_111℃
C. 104_111F
D. 40_45℃

32. The feathers are unique structures that are found only in birds ?

A. Yes
B. No

33. Endotherms means that they can maintain a constant (high) body temperature ?

A. Yes
B. No

34. Most species of birds that use Troper are very small example is ?

A. sparrow
B. Robin
C. Humming birds
D. Falcon

35. In birds only a small percentage of nephron…………contain a loop of Henly ?

A. 10_15 percent
B. 15_29 percent
C. 15_25 percent
D. 20_30 percent

36. The medullary cone of birds include…….?

A. Loop of Henly
B. Collecting Duct
C. Vasa Recta
D. All of these

37. A reptilian type of kidney in birds have no loop of Henly,located in medulla ?

A. Yes
B. No

38. Contration of birds pectoral muscles pull the wings downward ?

A. Yes
B. No

39. The concentrating ability of avain kidneys is more limited than in ?

A. Reptiles
B. Birds
C. Fishes
D. Mammals

40. Polyandry is spotted in ?

A. Gouse
B. Peacock
C. Sandpipers
D. None

41. Yolk is a —- rich food store ?

A. Protein
B. Cholesterol
C. Fat
D. All

42. Development will only resume in optiomal conditions after rising Temperature to 36.7℃ ?

A. True
B. False

43. Many birds have non functional salt glands ?

A. Yes
B. No

44. Gaseous exchange occurs through ?

A. Amnion
B. Allantoises
C. Yolk sac
D. Shell

45. Longitudinal migration occurs mostly in birds of ?

A. Australia
B. America
C. Europe
D. All

46. The weight of Small radio transmitter is about ?

A. 2-3 gm
B. 4-5 gm
C. 4-7 gm
D. 7-8 gm

47. Nutrients are provide by the female through some form of placenta in which type of viviparity ?

A. Hemotrophic viviparity
B. Placental viviparity
C. Ovoviviparity
D. Viviparous

48. In mammals the shortest gestation period of ___________ occurs in American opossum ?

A. 122/2 days
B. 121/2 days
C. 141/2 days
D. 152/2 days

49. King cobras are one of the deadliest species of venomous snakes ?

A. No
B. Yes

50. Developing young are attached to placenta by means of umbilical cord ?

A. Yes
B. No

51. Following are the function of placenta ?

A. Gas exchange
B. Nutrient supply
C. Removal of waste
D. All of these

52. To maintain negative balance during cold exposure animals need to adapt their food intake behavior ?

A. No
B. Yes

53. In early life stem cells differentiate into melanocytes the pigments of _______________?

A. Skin
B. Hair
C. Both A and B
D. None of these

54. The guard hairs, the shorter coarse hairs, are the most apparent on the surface of fur ?

A. Yes
B. No

55. Follicles enter the resting stage which may last for several ________ ?

A. Days or months
B. Months or years
C. Weeks or months
D. Days or years

56. Mammals that give birth to young ones belong to subclass ?

A. Eutheria
B. Metatheria
C. Prototheria
D. None

57. Prototheria also known as monotremes ?

A. No
B. Yes

58. Molars are ?

A. At back of jaws
B. Large
C. For crushing
D. All of these

59. Mammals that feed on grass and vegetation form groups ?

A. Browsers
B. Grazers
C. Both of these
D. None

60. This adaptation allows animal to blend in surroundings ?

A. Protective coloration
B. Mimicry
C. Migration
D. Hibernation

61. Herbivores generally have large, long digestive tracts ?

A. No
B. Yes

62. Carnivores mammals mainly feed on omnivores ?

A. No
B. Yes

63. Mammals in arctic have ?

A. Insulating layers
B. Thick layers of fats
C. Fur
D. All of these

64. The blood pressure in mammals is highest in ?

A. Aorta
B. capillary
C. veins
D. Venules

65. The mass of mammalian heart is ?

A. 0.54 Percent of the body mass
B. 0.32 percent of the body mass
C. 0.59 Percent of the body mass
D. O.60 Percent of the body mass

66. During the process of erythropoiesis in red bone marrow,the cells contain ?

A. Nucleus and ribosomes
B. Nucleus only
C. Nucleus and mitochondria
D. Nucleus,ribosomes and mitochondria

67. Most mammals have teeth composed of ?

A. Destin
B. Destinn and enamel
C. Enamel only
D. None of these

68. The esophagal sphincter is located at ?

A. Where esophagus starts
B. Where oral cavity ends
C. Where esophagus enters the stomach
D. None of these

69. Cartilaginous rings surround the trachea to prevent it from collapsing ?

A. Yes
B. No

70. Some insectivorous mammals have tongue as long as their entire body ?

A. Yes
B. No

71. Small intestine in most mammals is long and convulated ?

A. Yes
B. No

72. The descending colon terminates in the cecum ?

A. Yes
B. No

73. Large intestine consists of ?

A. Colon
B. Cecum
C. Rectum
D. All of these7

74. Ventral to the oropharynx is laryngophyranx ?

A. Yes
B. No

75. The larynx or voice box which is located near the anterior end of ?

A. Trachea
B. Esophagus
C. Pharynx
D. None of these

76. Examples of endotherm are ?

A. Humans
B. Birds
C. Both A and B
D. All of these

76. The lungs of most mammals are divided into ?

A. 2 lobes
B. 3 lobes
C. 4 lobes
D. 5 lobes

77. Deep diving mammals use their lungs as their major oxygen store house ?

A. Yes
B. No

78. The entire brain is enclosed and protected by how many meninges ?

A. Two
B. Three
C. Four
D. None

79. The hypothalamus contain cluster of nuclei that control autonomic function of the body ?

A. Water balance
B. Temperature regulation
C. Sleep and waking
D. All of these

80. The proportion of brain to body size is usually great in mammals than in other vertebrates ?

A. Yes
B. No

81. Major regions of the adult brain ?

A. Two
B. Three
C. Four
D. None

82. The habenula contributes to the coordination of olfactory reflexes ?

A. Yes
B. No

83. A dog can perceive higher frequencies that are completely inaudible to human ?

A. 16,000-20,000Hz
B. 30,000-40,000Hz
C. 40,000-60,000Hz
D. 10,000Hz

84. A tragus is a fleshy projection rising from the inner base of ear ?

A. Yes
B. No

85. All mammals have a middle ear that contain bones ?

A. Malleus and anvil
B. Incus and stapes
C. Incus and malleus
D. Malleus, incus and stapes

86. Vomeronasal (Jacobson’s) organ s are well developed in ?

A. Monotremes
B. Masrsupials
C. inectivores
D. All

87. The regulation or maintainance of a constant body fluid or internal environment is called ?

A. Osmoregulation
B. Thermoregulation
C. Homeostasis
D. Excretion

88. They connect the kidney to the inferior vena cava ?

A. Renal arteries
B. Rennal veins
C. Renal cortex
D. All

89. Taste buds are abundant in mammals and are found mainly on the tongue, palate and larynx ?

A. Yes
B. No

90. Chemicals that elicit a response from the other members of the same species are known as pheromones ?

A. Yes
B. No

91. Elimination of nitrogenous waste in the form of urea is called ureotelism ?

A. Yes
B. No

92. The passive biological system that removes excess material from the body of an organism ?

A. Excretory system
B. Circulatory system
C. Thermoregulation
D. None if them

93. The formation of excretory product in the form of ammonia is called ?

A. Ammonotelism
B. Ureotelism
C. Uricotelism
D. All

94. In selective reabsorption how many percent filtrate is absorbed?

A. 99 percent
B. 98 percent
C. 97 percent
D. 95 percent

95. How many nephrons are present in each kidney?

A. 1-1.5 billion
B. 1-1.2 billion
C. 1-1.5 million
D. 1-1.2 million

96. Renal tubules consist of four parts ?

A. Yes
B. No

97. First process in urine formation is ?

A. Ultra-filtration
B. Glomerulus filtration
C. Both
D. None of these

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