Civil Services Prep

Prelims 2013 · Science and Technology · Question 41

Many transplanted seedlings do not grow because

  1. the new soil does not contain favourable minerals
  2. most of the root hairs grip the new soil too hard
  3. most of the root hairs are lost during transplantation
  4. leaves get damaged during transplantation

Answer

most of the root hairs are lost during transplantation

  • (a) New soil minerals are usually not the immediate cause of failure after transplantation. Seedlings mainly fail due to root injury, not instant mineral deficiency. Verdict: Incorrect.
  • (b) Root hairs do not harm the plant by gripping soil too hard. They help in absorption of water and minerals. Verdict: Incorrect.
  • (c) Root hairs are very delicate and are often damaged or lost during transplantation. This reduces water absorption, so many transplanted seedlings fail to establish. Verdict: Correct.
  • (d) Leaf damage may occur, but it is not the main reason generally asked in plant physiology. The key problem is loss of root hairs. Verdict: Incorrect.
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