alleryGeotropism shown by the roots of a plant is:
APositive (growth towards gravity, downwards)
BNegative (growth against gravity, upwards)
CNeutral (no response to gravity)
DOpposite to shoots only
Answer & Solution
Correct answer: A. Positive (growth towards gravity, downwards)
1. ROOTS are POSITIVELY geotropic — they grow DOWNWARD, with gravity.
2. SHOOTS are NEGATIVELY geotropic — they grow UPWARD, against gravity.
3. Why: gravity is sensed via statoliths (starch-filled plastids) in root cap cells.
_Source: syllabus Science Ch 6 §6.3 Tropic Movements_
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