Advertisements
Advertisements
प्रश्न
An experiment was set up as shown in the figure given below . The twig in the diagram was intact on the plant and it was as such in sunlight for a few hours .
(i) What is the aim of the above experiment ?
(ii) Why was potassium hydroxide placed inside the conical flask ?
(iii) What test would you perform on the leaf inside the flask?
(iv) What is the expected result of the above test ?
(v) Is it necessary to similarly test on outer leaf also ? Giva a reason .
Advertisements
उत्तर
(i) The aim of the experiment is to prove that CO2 is necessary for photosynthesis.
(ii) Potassium hydroxide absorbs CO2 from the surrounding. It is placed to remove CO2 within the conical flask.
(iii) The leaf inside the conical flask would be tested for the presence of starch by the application of iodine.
(iv) The expected result of the above test is - No change in the colour will be observed.
(v) Yes, it is necessary to similarly test on the outer leaf also to show that leaves present in CO2 show photosynthesis.
APPEARS IN
संबंधित प्रश्न
Describe fully one experiment with potted green plant to show that starch is not produced in the leaves when carbon dioxide is not available (diagrams essential)
Complete the following statement by choosing the correct alternative given below :
All animals would die on the earth if there was no ______.
Photosynthesis in green plants is directly and indirectly dependent on so many plant structures.
Explain briefly the role of the following structures in this process Guard cells.
Given below is the representation of a certain phenomenon in nature. With four organisms 1-4.
Name the biological process which was the starting point of the whole chain.
Given alongside is the diagram of an experimental set-up:
Will it work satisfactorily? Given reason.
Chlorophyll is necessary for photosynthesis.
Differentiate Between:
Light reaction and Dark reaction.
Complete the following sentence with appropriate word:
Carbon dioxide enters the leaf through _______.
Write the overall chemical equation for photosynthesis.
Give reasons/explain:
During the starch test, the leaf is boiled in methylated spirit.
