Moll's half leaf experiment was done to show ...................... was required for photosynthesis.

Name the scientist who demonstrated the effect of different wavelengths of light on photosynthesis using green algae and aerobic bacteria.

If in a photosynthetic system,${H_2O}^{18}$ is provided,what will be the type of oxygen released in the process?

The statement "The amount of $CO_2$ absorbed and $O_2$ released during photosynthesis are in equal volumes" was proved by:

The curve showing the effectiveness of different wavelengths of light in photosynthesis was first given by Engelmann using all,except:

Variegated leaves of a plant were supplied with radioactive carbon dioxide $(^{14}CO_2)$ during an experiment. Leaf $X$ was kept in the dark and leaf $Y$ was kept in the light. At the end of the experiment,the radioactivity in the leaves was measured and found to be as shown in the diagram. What is the most likely explanation for the level of radioactivity found in the yellow zone of leaf $Y$?