Equally spaced ink marks are made on the radicle of a pea seedling. The seedling, with its radicle, horizontal as shown, is pinned to a card which is placed in a screw-top jar with some water. The jar is left in darkness for 24 hours. (a) Make a drawing to show how the seedling might look after this time. (b) What is the advantage to the seedling of this type of response? (c) Why was the jar left in darkness



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