Question

Why plants are killed in winter by frost ?
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Answer 1

Plants are killed in winter by frostas there is desiccation and mechanical damage to the tissues. Desiccation is the state of extreme dryness, or the process of extreme drying.

Answer 2

Plants are killed in winter by frost because the water present in cells freezes. Due to which on freezing it expand (due to anomalous expansion of water) and causes mechanical damage to the planet tissues.