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MCQs

Total Questions : 92 | Page 7 of 10 pages
Question 61. One liter of air contain oxygen about
  1.    200 ml
  2.    300 ml
  3.    100 ml
  4.    400 ml
 Discuss Question
Answer: Option A. -> 200 ml
Answer: (a).200 ml
Question 62. Capacity of human blood to carry oxygen is raised up to 75 times by
  1.    white blood cells
  2.    platelets
  3.    hemoglobin
  4.    coagulants
 Discuss Question
Answer: Option C. -> hemoglobin
Answer: (c).hemoglobin
Question 63. Flowering plants having rhizomes do not include
  1.    canna
  2.    lallang
  3.    ginger
  4.    garlic
 Discuss Question
Answer: Option D. -> garlic
Answer: (d).garlic
Question 64. The higher animals have special organs for exchange of gases as their skin is
  1.    thin
  2.    thick
  3.    soft
  4.    hard
 Discuss Question
Answer: Option B. -> thick
Answer: (b).thick
Question 65. The amount of air changes as there are changes in
  1.    Size of breathing
  2.    Depth of breathing
  3.    Rate of breathing
  4.    Volume of breathing
 Discuss Question
Answer: Option B. -> Depth of breathing
Answer: (b).Depth of breathing
Question 66. Aphids feed on plant juices through their
  1.    penetrators
  2.    sharp claws
  3.    proboscis
  4.    long beaks
 Discuss Question
Answer: Option C. -> proboscis
Answer: (c).proboscis
Question 67. Food substances like starch can be stored in
  1.    vascular bundles
  2.    epidermis
  3.    cuticle
  4.    pith
 Discuss Question
Answer: Option D. -> pith
Answer: (d).pith
Question 68. If there is too little carbon dioxide in the lungs the breathing movements will be
  1.    Stop
  2.    start
  3.    Decrease
  4.    Increase
 Discuss Question
Answer: Option A. -> Stop
Answer: (a).Stop
Question 69. Gaseous exchange between organism and their environment occurs through
  1.    diffusion
  2.    passive transport
  3.    active transport
  4.    osmosis
 Discuss Question
Answer: Option A. -> diffusion
Answer: (a).diffusion
Question 70. Trachea is supported by C-shaped rings of cartilage to kept it
  1.    close
  2.    elongate
  3.    open
  4.    strong
 Discuss Question
Answer: Option C. -> open
Answer: (c).open

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