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    Question:

    Give three advantages of the thickening spiral arrangement of the xylem vessels rather than a continuous thickening arrangement.

    Can't think of any, can someone come up with any?

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    Xylem is the main supporting structure in the plant stem and root. One advantage of a spiral arrangement in the stem is that it has greater resilience against the forces encountered above soil level, which are mainly horizontal in direction i.e. wind.

    Thinking teleologically, I would imagine, knowing that xylem has the function of transport of water nd minerals, that this function is facilitated in some way by a spiral thickening arrangement -improved capillarity ?? - sorry can't think of a specific second advantage!

    Mukesh.
 
 
 
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