Class 11 · Plant Growth and Development

Primary and Secondary Growth in Plants — NEET Biology

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You also know that in dicotyledonous plants and gymnosperms, the lateral meristems, vascular cambium and cork-cambium appear later in life. These are the meristems that cause the increase in the girth of the organs in which they are active. This is known as secondary growth of the plant.

NCERT Biology · Class 11 · Chapter 13 · Paragraph 6
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QuestionPractice Question

Why do lateral meristems like vascular cambium contribute to increase in girth and not length in dicots?

📖 Solution & NCERT Explanation
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Correct answer: A They produce secondary tissues

Lateral meristems such as vascular cambium and cork cambium divide to add secondary xylem and phloem, contributing to girth.

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You also know that in dicotyledonous plants and gymnosperms, the lateral meristems, vascular cambium and cork-cambium appear later in life. These are the meristems that cause the increase in the girth of the organs in which they are active.
Has this concept appeared in NEET?
Practice this NCERT concept with questions on MedicNEET.
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Plant Growth and Development, Class 11 NCERT Biology.

Through deep analysis of NEET and NTA, 176 of the 180 ReNEET 2026 (June 21) questions were already in the MedicNEET question bank before the exam.

176/180
of the ReNEET 2026 paper (all subjects) was already in the MedicNEET question bank

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