Answer:
2. Plant X: dark orange, Plant Y: dark purple
Explanation:
Two plants; plants X and Y were used in this experiment. Photosynthesis is the process by which green plants synthesize their food (sugar). Plants make use of the energy they capture from sunlight via their Chlorophyll pigment to power the photosynthetic process. Plants cannot perform the process of photosynthesis in the absence of sunlight i.e. No sunlight, No photosynthesis and ultimately no sugar.
In the case of this experiment, Plant X was placed in a dark closet while Plant Y was placed on a sunny windowsill. Due to the absence of light in the dark closet, plant X will be unable to photosynthesize and produce sugars while plant Y, due to its exposure to ample sunlight, would be able to produce sugars in its leaves via photosynthesis.
Therefore, since dark purple = sugars are present and dark orange = sugars are not present when tested with a chemical indicator, plant X's leaf will give a dark orange color because it produced no sugars in its leaves as it was unable to photosynthesize. Plant Y's leaf will give a dark purple color because it produced sugar in its leaves as a result of photosynthesis.
