Question

Observe the following figures:
Both the plants ‘A’ and ‘B’ were kept in sunlight after watering. The part of the leaf of
plant ‘B’ which was inserted in the glass bottle containing KOH (Potassium hydroxide) did
not turn blue in the iodine test/ starch test, indicating the absence of starch. The part of the
leaf outside the bottle turns blue in the said test. Photosynthesis didn’t occur in that part of
the leaf due to the non-availability of _____________ .
a) Sunlight b) ChlorophyII c) CO2 d) Water
(i) List out the factors which are available to the part of the leaf outside the bottle

Answer 1

CO2 because Koh absorbs CO2 without CO2 we won't get blue color because there is no starch formation