$\mathrm{C}_{4}$ plants show response to $\mathrm{CO}_{2}$ concentration at about $\_\_\_\_$ A while

Question

$\mathrm{C}_{4}$ plants show response to $\mathrm{CO}_{2}$ concentration at about $\_\_\_\_$ A while $C_{3}$ plants show response only beyond $\_\_\_\_$ B .\ Select the correct values for $A$ and $B$.

Professor PC Thomas Classes · Answer

(b) : $\mathrm{C}_{4}$ plants show response to $\mathrm{CO}_{2}$ concentration at about $360 \mu \mathrm{l} \mathrm{L}^{-1}$ while $\mathrm{C}_{3}$ plants show response only beyond $450 \mu \mathrm{~L} \mathrm{~L}^{-1}$.