Advertisements
Advertisements
प्रश्न
Write an experiment to demonstrate that CO2 is necessary for photosynthesis.
Advertisements
उत्तर
Take a destarched plant. Insert one of its leaves in a conical flask, which contains potassium hydroxide. Leave it in the sunlight. After a few hours, test this and any other leaf of this plant for starch. The leaf which was exposed to the atmospheric air becomes blue-black, and the one in the flask containing KOH does not become blue-black after the iodine test. The experiment showing that CO2 is necessary for photosynthesis.
APPEARS IN
संबंधित प्रश्न
The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow :
What will you observe in the experimental leaf after the starch test?
The following statement is about photosynthesis in a green plant. Write whether it is True or False.
Photosynthesis occurs in underground organs as well as in aerial ones.
Identify the false statement and rewrite it correctly by changing the first or last word only.
Green plants perform photosynthesis.
Are the following statement true or false? Give reason in support of your answer.
The starting point of carbon cycle is the release of carbon dioxide by animals during respiration.
Oxygen given out during photosynthesis comes from water. Explain this statement.
Complete the following sentence with appropriate word:
A light reaction is a ___________ reaction.
Choose the Correct Answer:
Which would do maximum harm to a tree?
To which directional stimuli do
- roots respond
- shoots respond?
The bending of shoot towards light is due to the hormone ______.
