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प्रश्न
Mention two ways in which photosynthesis is useful to life.
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उत्तर
Advantages of photosynthesis:
(a) To produce food for all the organisms on earth.
(b) Release oxygen which is a life supporting gas.
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संबंधित प्रश्न
Give one example of An aquatic plant used in the laboratory to demonstrate O2 liberation during photosynthesis
Mention any two points in which photosynthesis and respiration in plants are opposite to each other.
The following statement is about photosynthesis in a green plant. Write whether it is True or False.
A variegated leaf (one that has white as well as green patches) will only photosynthesize in the green areas.
How does carbon dioxide return to the atmosphere? Explain.
A student in order to study the importance of certain factors of photosynthesis took a potted plant and kept it in the dark for over 24 hours. Then in the early hours of the morning the student covered one of the leaves with black paper in the centre only. Student placed the potted plant in the sunlight for a few hours, and then tested the leaf which was covered with black paper for starch.
(i) What aspect of photosynthesis was being investigated?
(ii) Is there any control in this experiment? If so, state the name.
(iii) Why was the plant kept in the dark before the experiment?
(iv) Describe step by step how the candidate proceeded to test the leaf for the presence of starch.
Give technical term:
The part of the chloroplast where the dark reaction of photosynthesis takes place.
Write the functional activity of the following structure:
Stroma
The role of chlorophyll is to absorb light from the sun.
Sunflowers open the petals in bright light during the daytime but close the petals in dark at night. This response of sunflowers is called ______.
The end product of photosynthesis is ______.
1. What happens to the dandelion flower
- During the daytime?
- At night?
2. What is the phenomenon known as?
