which experiment is need to show that green plants produce oxygen during photosynthesis?
which experiment is need to show that leaves make starch as food by photosynthesis and that sunlight is necessary for photosynthesis ?
which experiment is need to show that photosynthesis takes place only in the green portion of the leaves ?
how do plants obtain their requirements for photosynthesis ?
what is the role of leaves in photosynthesis?
Answers
Experiments on Photosynthesis: Co2 is Necessary for Photosynthesis
EXPERIMENT TO PROVE THE NECESSITY OF CARBON DIOXIDE IN PHOTOSYNTHESIS - DEFINITION
To prove the necessity of carbon dioxide in photosynthesis following steps need to do
Insert a part of the leaf of a destarched plant into a conical flask containing potassium hydroxide.
Potassium hydroxide solution absorbs the carbon dioxide gas from the air present in the glass bottle.
Leave the plant sunlight.
After few hours, perform a starch test to this and another leaf of the same plant.
Observation-
Leaf exposed to the atmosphere are bluish black.
Leaf exposed to KOH does not change to blue-black colour
Result- Starch is present in the green part of the leaf.
Conclusion- Presence of starch proves that chlorophyll is necessary for photosynthesis as it traps sunlight.