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प्रश्न
Answer the following:
Mention two significant advantages of photosynthesis to the living world as a whole.
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उत्तर
Advantage of photosynthesis :
- To produce food for all the organisms on earth .
- Release oxygen which is a life supporting gas .
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संबंधित प्रश्न
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?
Name the following:
The organisms that can be called "natural purifiers" of the air.
A candidate studied the importance of certain factors in photosynthesis. He took a potted plant and kept in the dark for over 24 hours. In the early hours of the next morning, he covered one of the leaves with black paper in the centre only. Then he placed the plant in sunlight for a few hours and tested the leaf which was covered with black paper for starch.
Why was the plant kept in the dark before the experiment?
How do non-green plants such as fungi and bacteria obtain their nourishment?
Draw a neat and well-labeled diagram of the apparatus you would set up to show that oxygen is given out during photosynthesis.
Complete the following sentence with appropriate word:
Xanthophyll is ______ coloured pigment.
Choose the Correct Answer:
Compensation point means the condition:
In leaves, the food is stored in the form of ______.
Guard cells of stomata are green but cannot photosynthesize? Give reason.
A potted plant with variegated leafes was kept in dark for 24 hours and then placed in bright sunlight. Answer the following questions.
- Which aspect of photosynthesis is being tested in the above diagram?
- Why was the plant kept in the dark for 24 hours?
- After the starch test, what will be the colour of the yellow and green parts of the leaf? Give reasons to support your answer.
