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The casparian strip prevents passive movement of water and minerals, forcing selective absorption through plasma membranes.
Ref: NCERT Class 11 Biology Chapter 6: Anatomy of Flowering Plants Anatomy of Dicot and Monocot Root
Answer: C) Suberin and lignin. For MINERAL Transport, remember the key idea and you’ll land on this option; the distractors usually swap cause and effect or confuse similar terms. Avoid: A) Cellulose and pectin; B) Cutin and wax; D) Hemicellulose. Name the process first, then pick the option that describes it — don’t reverse cause and effect.
Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.
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