The outer tissue of cambium develops in to:
Correct answer: B. Phloem
- A. Xylem
- B. Phloem
- C. Cortex
- D. Epidermis
Explanation
The cambium is a layer of actively dividing cells in plants that contributes to secondary growth by producing new cells. On its outer side, the cambium generates phloem, which is essential for transporting sugars and nutrients throughout the plant. In contrast, xylem forms on the inner side of the cambium and is responsible for water and mineral transport. The cortex is a separate tissue, formed from the primary meristem, and the epidermis originates from the apical meristem, not the cambium.
This question appeared on the ETEA MDCAT 2016 paper, which you can sit online with every answer explained.
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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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