Asked in FBISE Biology 2022 — Paper 3 2022

Secondary xylem is produced by the activity of :

Correct answer: C. Vascular cambium

  • A. Apical meristem
  • B. cork cambium
  • C. Vascular cambium
  • D. intercalary meristem

Explanation

Secondary xylem, also known as wood, is a tissue produced by the vascular cambium during secondary growth. It is made up of tracheids, vessel elements, fibers, and parenchyma cells. These cells provide mechanical support to the plant and conduct water and minerals from the roots to the leaves.

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About Plant Nutrition and Transport

Plants require macronutrients and micronutrients for growth, and mineral deficiencies produce recognizable symptoms. Transport involves water and minerals through xylem by transpiration pull, cohesion and adhesion, while phloem translocates sugars from sources to sinks. Root pressure and transpiration are distinct mechanisms.

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