Which plant is commonly used in a laboratory experiment to demonstrate the evolution of oxygen during photosynthesis?

When a rat was placed into a closed container,it got suffocated and died,but when a plant was also introduced into it,the rat survived. Who performed this experiment?

The scientist who proved that bacteria use $H_2S$ gas and $CO_2$ to synthesize carbohydrates is

Most of the plants contain a green colouring pigment which is responsible for photosynthesis. This pigment was named chlorophyll by

Which of the following did the scientist Melvin Calvin use to discover the biosynthetic pathway of photosynthesis?

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 $Y$?