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The method that renders the seed coat permeable to water so that embryo expansion is not physically retarded is

1. vernalization
2. stratification
3. denudation
4. scarification

Correct answer: scarification

Solution

Scarification makes the seed coat permeable, allowing water uptake and preventing the embryo from being mechanically restrained during germination. Vernalization and stratification are cold treatments, while denudation means removal of coverings, not specifically seed-coat permeability.

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