How to prove that sunlight is essential for photosynthesis?
Answers
Answer
Explanation:
Steps to conduct Iodine Test:-(Courtesy:-dev.elearn.punjab.gov.pk)
First the experimental leaf is dipped in boiling water in the beaker for few minutes so that the cells of the leaf will be killed and metabolic process of the leaf cells will be stopped.
Now the boiled leaf in water is removed from the beaker with the help of a forceps and is placed in a test tube containing mentholated spirit. Then the leaf is boiled in mentholated spirit or ethanol over a water bath by keeping it in boiling water for about 10 minutes. The leaf looses its chlorophyll by boiling it in mentholated spirit and becomes pale-white.
Then the pale-white leaf is removed from the test tube and then it is washed in warm water to soften it.
Then this leaf is spread over a white porcelain tile and iodine drops are poured over at different places of the leaf.
Result of Iodine test
Iodine is a purple colored reagent used to test the presence or absence of starch in the leaf conducted for photosynthesis process. When iodine test is conducted for the experimental leaf, the leaf where black paper was covered will turn into brown color and the part of the leaf which is not covered with black paper will turn into blue-black color. This result clearly indicates starch is formed in the leaf where sunlight is available and starch is not formed where the leaf doesn't got the sunlight as it is covered by black paper.
Answer:
Explanation:sunlight is very important for photosynthesis because it provide an light energy to plant if the sunlight is not given to plant so, it stop make the food ,starch and oxygen