Plz solve plz plz for 5 mark question

Plz solve plz plz for 5 mark question 4. How are C. plants more etiiC1cnt thun C, plants Explain the fixation of C02 in C. plants.

Dear Student

C4 plants are prefered then C3 plants because in higher temperatures the enzyme RuBisCO (required for carbon dioxide fixation) fixes oxygen in place of carbon dioxide, this wasteful process is known as photorespiration. 
C3 plants have this disadvantage that in hot dry conditions their photosynthetic efficiency suffers because of photorespiration. 
Whereas C4 plants like sugarcane have evolved to avoid this wasteful process of photorespiration by fixing carbon dioxide in mesophyll cells and then this fixed carbon in form of 4 carbon compounds namely malate or aspartate is shuttled to bundle sheath cells.   

Please go through our study material for the second part of the question. It is explained very well over there. Get back to us for more queries.

Regards

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