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प्रश्न
Two similar green plants are kept separately in oxygen free containers, one in dark and the other in continuous light. Which one will live longer? Give reasons.
उत्तर
The plant kept in continuous light will live longer as the leaves of the plants will be able to make food for the plant through photosynthesis. However, in the absence of light, the leaves will not be able to make food. This is because photosynthesis will not take place in the absence of light. Hence, the plant kept in dark will live shorter as compared to the plant kept in light.
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संबंधित प्रश्न
The autotrophic mode of nutrition requires ______.
Name the following:
The pores through which leaves exchange gases.
Apart from sunlight and chlorophyll, what other things are required to make food by photosynthesis?
Name a gas used in photosynthesis.
Name the organelle of plant cells in which photosynthesis occurs.
Apart from carbon dioxide and water, name four other raw materials which are needed by the plants.
Name the green pigment present in the leaves of a plant.
When carrying out the starch test on a leaf, why is it important to boil the leaf in alcohol?
(a) to dissolve the waxy cuticle
(b) to make the cells more permeable to iodine solution
(c) to remove the chlorophyll
(d) to stop chemical reactions in the cells.
The Figure shown below represents an activity to prove the requirements for photosynthesis. During this activity, two healthy potted plants were kept in the dark for 72 hours. After 72 hours, KOH is kept in the watch glass in setup X and not in setup Y. Both these setups are air tight and have been kept in light for 6 hours. Then, Iodine Test is performed with one leaf from each of the two plants X and Y.
This experimental set up is used to prove essentiality of which of the following requirements of photosynthesis?
What are the by-products of autotrophic nutrition?
