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

  • question_answer The cells shown in the figure can be found in the blood. Which of the following statements is/are correct regarding these cells?
    (i) They do not have nucleus.
    (ii) They help the body to fight against infections.
    (iii) They help the blood to clot.
    (iv) They help to transport oxygen.
                     

    A)  (ii) only                                

    B)  (i) and (ii) only                      

    C)  (i), (ii) and (iii) only                  

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

    Correct Answer: A

    Solution :

    Given figures represent lymphocyte and basophil respectively, which are the types of leucocytes (WBCs). Leucocytes are those cells of blood whose main function is to fight against diseases by destroying harmful bacteria and other foreign materials. They possess nucleus. Clotting of blood is the function of blood platelets and transport of oxygen is the function of RBCs.


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