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Question 84

Transpiration is sometimes called a necessary cost of having leaves. Which benefits does it actually bring the plant? Select all that apply.

  1. It draws water up from the rootsCorrect answer
  2. It carries sugar from the leaves down to the roots
  3. It brings dissolved minerals up to the leavesCorrect answer
  4. It pushes carbon dioxide into the leaf along with the water
  5. It cools the leavesCorrect answer

Explanation

Water leaving the leaves keeps the column in the water-carrying tissue on the move, which draws up both the water itself and the minerals dissolved in it, and evaporation removes heat from the leaf as it happens. Moving sugar is the job of the other transport tissue, and the gas a leaf needs diffuses in through the pores under its own concentration difference rather than being pushed in by the arriving water.

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Question 84: Transpiration is sometimes called a necessary cost of… · Plants and Photosynthesis · Questena