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  3. 7th Class
  4. Science
  5. Transportation in Animals and Plants

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

  • question_answer
    Why is blood that flows from lungs to the heart bright red rather than dark red?

    A)  \[\text{C}{{\text{O}}_{\text{2}}}\] makes it red

    B) Oxygen makes it red

    C) Gastric juices make it red

    D) Lungs add a pigment to blood

    Correct Answer: B

    Solution :

    Oxygen makes it red


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