Question

59. One of the following does not have a nucleus. This one is :
(a) red blood cell
(b) white blood cell
(c) guard cell
(d) epidermal cell
60. The component of blood which makes chemicals known as antibodies is :
(a) platelets
(b) white blood cells (c) red blood cells (d) plasma
61. An animal in which the oxygenation of blood does not take place in the lungs is :
(a) cow
(b) fish
(c) frog
(d) fox
62. Which of the following carries substances upwards as well as downwards in a plant?
(a) xylem
(b) companion cells (c) phloem
(d) tracheids
63. One of the following is not a constituent of blood. This one is :
(a) red blood cells
(b) white blood cells (c) sieve plates
(d) platelets
64. If a patient is put on dialysis, he is most likely suffering from a severe ailment of the :
(a) circulatory system (b) respiratory system (C) excretory system (d) digestive system
65. Water absorption through roots can be increased by keeping the potted plants :
(a) in the shade
(b) in dim light
(c) under the fan
(d) covered with a polythene bag
66. A blood vessel which carries blood back to the heart is :
(a) artery
(6) vein
(c) capillary
(d) platelet
67. Blood is pumped from the heart to the entire body by the :
(a) lungs
(b) ventricles
(c) atria
(d) nerves
68. The blood leaving the tissues becomes richer in :
(a) carbon dioxide
(b) water
(c) haemoglobin
69. What prevents the backflow of blood inside the heart during contraction ?
(a) thick muscular walls of ventricles
(b) valves
(c) thin walls of atria
(d) all of the above
70. Which of the following is the correct path taken by urine in our body ?
(a) kidney ureter
urethra bladder
(b) kidney bladder urethra
→ ureter
(c) kidney
→ ureter
bladder urethra
(d) oxygen​

Answer 1

59. Red Blood Cells

60. White Blood Cells

61. Fish ( oxygenation in gills)

62. Phloem

63. Sieve Plates

64. Excretory System

65. In a Shade

66. Vein

67. Ventricles

68. Carbon Dioxide

69. Valves

70. kidney - ureter - bladder - urethra