Answer:
Plant may die after several weeks due to non availability of CO2
Step-by-step explanation:
When a plant is plotted in a covered polythene , it is sure that it has limited or no supply of air.
Thus , a plant will photosynthesis till the there is air in the air tight jar. Once the air get consumed in the jar, no CO2 will be available to the plant for carrying out the photo chemical reaction of photosynthesis process.
Hence, after a few days the plant may start decaying and it may die after several weeks.