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السؤال 85

What do the roots of a plant take in from the soil around them?

  1. Sugar left by bacteria
  2. Ready-made food that the plant then burns for energy
  3. Water and mineral ionsالإجابة الصحيحة
  4. Carbon dioxide dissolved in the soil water

الشرح

Roots are absorbing organs for the water a plant needs and for the small quantities of dissolved ions it uses as raw materials, and nothing else crosses in from the soil in any useful amount. Calling what enters ready-made food turns the biology round, because a plant is the sort of organism that manufactures food rather than one that collects it.

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السؤال 85: What do the roots of a plant take in from the soil around… · Plants and Photosynthesis · Questena