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प्रश्न
Why Is Photosynthesis Important in Nature?
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उत्तर
The body of all living organisms both plants and animals is dependent on the food that has been synthesized in a green cell by photosynthesis. The purification of the atmosphere whereby the volume of CO2 remains fairly constant due to the photosynthetic activity of green plants. Oxygen is given out by green plants.
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संबंधित 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 .
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)
Why is it not possible to demonstrate respiration in a green plant kept in sunlight?
How would you demonstrate that green plants release oxygen when exposed to light?
How do non-green plants such as fungi and bacteria obtain their nourishment?
A potted plant was taken in order to prove a factor necessary for photosynthesis. The potted plant was kept in the dark for 24 hours. One of the leaves was covered with black paper in the centre. The potted plant was then placed in sunlight for a few hours.
During the starch test, why was the leaf
(1) boiled in water
(2) boiled in methylated spirit
Chlorophyll is necessary for photosynthesis.
ATP is needed for the dark reaction.
Name the following:
The green colouring matter of the plants.
Given below is the diagram of an experimental set-up (final stage). Study the same and answer the following questions:
- What is the main aim of the experiment?
- Oxygen gas shown in the experiment is released from which of the raw materials?
- How would you confirm the presence of oxygen gas?
- Name the chemical substance which can be added in water to enhance the process/rate of release of oxygen gas.
- Draw a neat and labelled diagram of the same experiment for its initial stage.
