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The main characteristics of roots are:

  1. Roots constitute the non-green descending portion of the plant axis which is positively geotropic or negatively phototropic.
  2. The roots cannot perform the function of photosynthesis since its lacks chlorophyll.
  3. It shows lateral unicellular root hairs, which increase the surface area for absorption.
  4. It shows root apex which is protected by a root cap.
  5. It does not show nodes, internodes, buds and leaves but shows lateral branches which arise from the pericycle.
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