Question

1. Will a leaf taken from a potted plant kept in a dark room for a few days turn
blue black when tested for starch? Give reasons for your answer

Answer 1

because photosynthesis stops and it shows shortage of co2

Answer 2

the plant makes glucose in the presence of sunlight by photosynthesis .

this glucose is converted and stored in the form of starch

when the plant is kept in dark . there will be no photosynthesis and the plant will use up the stored starch

therefore it will not show blue black when tested for starch