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

  • question_answer Consider the following statements. Select the option which correctly identifies true (T) and false (F) ones.
    (i) The valve between left and right atrium allow the blood to flow only in one direction.
    (ii) The contents of phloem can move only in the upward direction whereas water in xylem moves both in the upward and downward directions.
    (iii) A healthy adult man excretes an; average of 1.5 litres of urine every day.
    (iv) Red blood cells are the biconcave, disc shaped structures filled with haemoglobin.   

    A)

    (i) (ii) (iii) (iv)
    F F T T
     

    B)

    (i) (ii) (iii) (iv)
    T F T T
     

    C)

    (i) (ii) (iii) (iv)
    F T T F
     

    D)

    (i) (ii) (iii) (iv)
    F F T F
     

    Correct Answer: A

    Solution :

    There are no valves between left and right atrium. Water in xylem can moves only in the upward direction whereas contents of phloem move in the upward and downward direction.                               


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