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प्रश्न
Why is it not possible to demonstrate respiration in a green plant kept in sunlight?
Give reasons/explain:
It is not possible to demonstrate respiration in a green plant kept in sunlight.
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उत्तर १
If a green plant is kept in bright light, it tends to use up all the CO2 produced during respiration for photosynthesis. Thus, the release of CO2 cannot be demonstrated. Hence, it is difficult to demonstrate respiration as these two processes occur simultaneously.
उत्तर २
When a plant is kept in sunlight, CO2 released by respiration gets used by photosynthesis to synthesise food. So no carbon dioxide is liberated, and respiration cannot be demonstrated.
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 .
Complete the following statement by choosing the correct alternative given below :
All animals would die on the earth if there was no ______.
Fill in the blank:
Land plants obtain their carbon dioxide from the ______.
Mention one difference between the following on the basis of what is given in bracket.
Chlorophyll and chloroplast (part of plant cell)
Given below is the representation of a certain phenomenon in nature. With four organisms 1-4.
Name one natural element which all the organisms 2-4 and even 5 are getting from No. 1 for their survival.
Given alongside is the diagram of an experimental set-up:
What alteration (s) will you make in it for obtaining expected result?
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.
Draw a neat diagram of a chloroplast and label its parts.
Give technical term:
Name the experiment to demonstrate the importance of light for photosynthesis.
Complete the following sentence with appropriate word:
Carbon dioxide enters the leaf through _______.
