$A$ plant is kept in $300 \, ppm$ $CO_2$ concentration. What will happen to it?

Look at leaves of the same plant on the shady side and compare them with the leaves on the sunny side. Or,compare the potted plants kept in the sunlight with those in the shade. Which of them has leaves that are darker green? Why?

If the concentration of $CO_2$ in the atmosphere is as high as $400 \ ppm$,then......

Light saturation for photosynthesis occurs at $...........\%$ of full sunlight.

The Law of Limiting Factors was proposed in which year?

Who proposed the Law of Limiting Factors?