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4. All of the following may serve to break dormancy and initiate seed germination except fire abrasion treatment with abscisi
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Answer: Treatment with abscisic acid.

Explanation: Seed dormancy is a period which inhibits the germination of a seed because of unfavorable conditions. During dormancy probability of a seed to survive is low. Exposure to water, fire, startification, and treatment with hormone gibberellins break seed dormancy. However treatment with abscisic acid promotes seed dormancy.

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