Advertisements
Advertisements
Question
Write an experiment to demonstrate that CO2 is necessary for photosynthesis.
Solution
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
RELATED QUESTIONS
The diagrams given below represent the relationship between a mouse and a physiological process that occurs in green plants. Study the diagrams and answer the questions that follow
(i) Name the physiological process occurring in the green plant that has kept the mouse alive.
(ii) Explain the physiological process mentioned above.
(iii) Why did the mouse die in bell jar B?
(iv) What is the significance of the process as stated in (i) for life on earth?
(v) Represent the above mentioned physiological process in the form of a chemical equation.
Given below is an experiment setup to demonstrate a particualr tropic movement in germinating seeds. Study the diagram and answer the questions that follow :
Part 1 is affected by two stimuli. Name them. Which one of the two is stronger? 
Part 1 is affected by two stimuli. Name them. Which one of the two is stronger?
Define the following:
Quantum
Mention any two points in which photosynthesis and respiration in plants are opposite to each other.
Identify the false statements and rewrite them correctly by changing the first or last word only.
Immediate product of photosynthesis is glucose.
Are the following statement true or false? Give a reason in support of your answer.
Photosynthesis is considered as a process supporting all life on earth.
Complete the following food chains by writing the names of appropriate organisms in the blanks:
Grass → ______ → Snake → ______
Explain, why respiration is said to be a reversed process of photosynthesis?
Photosynthesis is considered as a process supporting all life on earth.
Give technical term:
What does ATP abbreviate for?
Give technical term:
What does NADP stand for?
Complete the following sentence with appropriate word:
AIIP stands for ____________.
Write the functional activity of the following structure:
Granum
Write the functional activity of the following structure:
Thylakoids
Choose the correct option.
For fixing one molecule of CO2 in Calvin cycle _______ are required.
What will happen if we remove the fish from the aquarium and keep it (with green plants) in a dark place?
The chemical reaction occurs during photosynthesis is ______.
What are primary producers?
1. What happens to the dandelion flower
- During the daytime?
- At night?
2. What is the phenomenon known as?
Define photosynthesis.
