Question

Moll's experiment shows

• A. Unequal transpiration from two surfaces of leaf
• B. $C{O}_2$ is essential for photosynthesis
• C. Relation between transpiration and absorption
• D. Chlorophyll is essential for photosynthesis

Answer 1

The correct option is B $C{O}_2$ is essential for photosynthesis

Moll's experiment shows that $C{O}_2$ is essential for photosynthesis. He demonstrated it by his half leaf experiment. A part of leaf was enclosed in a test tube containing some KOH soaked cotton which absorbs $C{O}_2$, while the other half of leaf was exposed to air. When the two halves of leaf were tested for starch, it was found that only the exposed part of leaf tested positive starch. This showed us that $C{O}_2$ is required for photosynthesis.

So, the correct answer is '$C{O}_2$'