UPSC General Studies Sample Paper General Studies Sample Paper-1

  • question_answer
    Which of the following statements are correct?
    1. The vascular tissue for the transport of water and nutrients in the plant is called the xylem.
    2. Veins are the vessels which carry carbon dioxide-rich blood from all parts of the body back to the heart.
    3. Arteries carry oxygen-rich blood from the heart to all parts of the body.
    4. The arteries have thin walls whereas the veins have thick elastic walls.
    5. The food synthesised by leaves has to be transported to all parts of the plant. This is done by the vascular tissue called the phloem.
    Select the correct answer using the codes given below.

    A)  2 and 4

    B)         1, 3 and 4          

    C)  1, 3 and 5                    

    D)  1, 2, 3 and 5

    Correct Answer: D

    Solution :

    [d] Xylem The water conducting tissue of vascular plants, which consists of dead hollow cells (like wood) in the form of fibers and sclereids which transport water and nutrients. Arteries bring oxygenated blood to the tissue (except pulmonary arteries) and veins bring deoxygenated blood back to heart (except pulmonary veins). Veins have thin walls. Since, blood flow is rapid and at a high Pressure, the arteries have thick and elastic walls.

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