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What is the role of the large bundle sheath cells around the vascular bundles of C4 plants?

  • (a) to provide the site for the photorespiratory pathway Your answer
  • (b) to enable the plant to tolerate high temperature Your answer
  • (c) to protect the vascular tissue from high light intensity Your answer
  • (d) to increase the number of chloroplasts for the operation of the Calvin cycle Correct
Your answer: Correct answer: (d)
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Explanation

Why (d) is correct

The large bundle sheath cells of C4 plants have many chloroplasts. CO2 is released inside them and the Calvin cycle runs there, so they provide the chloroplasts for the Calvin cycle.

Why the other options are wrong

  • (a) · your answer C4 plants avoid photorespiration; the bundle sheath is not provided for it.
  • (b) · your answer High-temperature tolerance is a feature of C4 plants as a whole, not the stated role of these cells.
  • (c) · your answer The bundle sheath is not there to shield vascular tissue from light.
NCERT point: Kranz anatomy: large bundle sheath cells in a ring around the vascular bundles, rich in chloroplasts.
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