7th Class Science Transportation in Animals and Plants Question Bank Transportation in Plants and Animals

  • question_answer Refer to the given figures of blood cells and select the correct statements regarding X, Y and Z.         
    (i)  X plays a key role in transporting waste carbon dioxide from the tissues to the lungs.
    (ii) The pigment present in Z absorbs oxygen and transports it to the cells all over the body.                  
    (iji) X is able to move on their own.
    (iv) Y helps the blood to clot whenever there is a wound on the body.
    (v) V is important part of our immune system.
    (vi) Z produces special protein substances, i.e., antibodies that protect us from infection.

    A)  (i), (ii), (iii), (iv) and (vi) only

    B)  (ii), (iii) and (iv) only

    C)  (iii), (iv) and (v) only

    D)  (i), (ii), (iii) and (iv) only

    Correct Answer: B

    Solution :

    In the given figure X, Y and Z refer to white blood cell (WBC), red blood cell (RBC) and platelets respectively. Red blood cell (RBC) plays a key role in transporting waste carbon dioxide from the tissues to the lungs. White blood cells (WBCs) are important part of our immune system. White blood cells (WBCs) produces special protein substances i.e., antibodies that protect us from infection.

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