Question

A student sets up an experiment to study the photosynthesis in plants. The student de starched a potted plant by keeping it in a dark room for 3 days. Half of the portion of de starched leaf was placed in a bottle containing caustic potash (absorbs CO₂). The student then places the plant in light and tests the leaf after 5 hours for the presence of starch. The portions inside the bottle shows negative starch test by reflecting no change in colour when react with iodine, however, other upper portions of the leaf gave positive starch test showing blue-black colour with iodine. What can be evaluated from this experiment? (a)carbon dioxide is directly linked with the colour of leaf b)carbon dioxide is necessary for preparing carbohydrate (c)lack of carbon dioxide increases amount of starch in plant (d)lack of carbon dioxide slows the process of photosynthesis​

Answer 1

The answer is B)carbon dioxide is necessary for preparing

carbohydrates

Answer 2

Answer: (b)

Explanation: (b) Carbon dioxide is necessary for preparing carbohydrate