General Knowledge - Biology - Discussion

Discussion :: Biology - Section 1 (Q.No.66)

66. 

Plants are killed in winter by frost

[A]. because of desiccation and mechanical damage to the tissues
[B]. because no photosynthesis takes place at such low temperature
[C]. because respiration ceases at such low temperature
[D]. because there is no transpiration

Answer: Option A

Explanation:

No answer description available for this question.

Ramavatar said: (Jun 12, 2011)  
Please write corret answers, please.

Smat said: (Sep 22, 2012)  
Generally at low temperature enzymatic activity ceases, so enzyme related with respiration will not be able catabolise the respiration reaction. Therefore respiration get ceases and plat get killed. C. Is correct option.

Dipti said: (Feb 18, 2014)  
How comes mechanical damage to the tissue in winter please explain?

Gurmeet said: (May 5, 2014)  
Low temp. Cause damage either directly by freezing cellular water or indirectly by freezing soil water, making it enable to uptake water. Mechanical damage occur due to weight of frozen water i.e. snow. So A is the correct answer. To know more read ABIOTIC WINTER DAMAGE.

Husain Raza said: (Jul 9, 2016)  
Option B is correct because no photosynthesis takes place at such low temperature.

Amit Chandela said: (Mar 17, 2017)  
I too think B is correct option.

Keerthana M Lal said: (Jan 20, 2018)  
During winter water freezes.

When water freezes it expands, i.e, the volume of ice is greater than that of water. So, the water inside the cell expands and as a result the cell membrane gets broken.

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