Q 1 :    

With reference to factors affecting the rate of photosynthesis, which of the following statements is not correct?      [2017]

• Increasing atmospheric $C{O}_2$ concentration up to 0.05% can enhance $C{O}_2$ fixation rate.

   

• $C_3$ plants respond to higher temperature with enhanced photosynthesis while $C_4$ plants have much lower temperature optimum.

   

• Tomato is a greenhouse crop which can be grown in $C{O}_2$-enriched atmosphere for higher yield.

   

• Light saturation for $C{O}_2$ fixation occurs at 10% of full sunlight