Plants are killed in winter by frost:
Correct answer: A. Because of desiccation and mechanical damage to the tissues
- A. Because of desiccation and mechanical damage to the tissues
- B. Because respiration ceases at such a low temperature
- C. Because no photosynthesis takes place at such a low temperature
- D. Because there is no transpiration
Explanation
Frost causes cellular dehydration as water freezes outside cells and can also rupture tissues through ice formation and expansion. Transpiration, respiration, and photosynthesis may be reduced, but they are not the main direct cause of frost injury.
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