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प्रश्न
What will happen to the rate of photosynthesis on a plant under the following circumstances?
(i) cloudy day in morning but bright sunshine in the afternoon
(ii) no rainfall in the area for a considerable time.
(iii) gathering of dust on the leaves
उत्तर
The rate of photosynthesis will:
(i) first decrease as there will be less sunlight and then increase during the afternoon
(ii) decrease due to less availability of water
(iii) decrease due to the closed stomatal pores
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संबंधित प्रश्न
Show with the help of a sketch that the plants are the ultimate source of food.
Which part of the plant takes in carbon dioxide from the air for photosynthesis?
In addition to carbon dioxide and water, state two other conditions necessary for the process of photosynthesis to take place.
Apart from carbon dioxide and water, name four other raw materials which are needed by the plants.
The process in plants which converts light energy into chemical energy.
Write a chemical equation to show the process of photosynthesis in plants.
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 internal energy (cellular energy) reserve in autotrophs is:
(a) proteins
(b) fatty acids
(c) glycogen
(d) starch
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.
Which of the following steps can be followed for making the apparatus air tight?
- placing the plants on glass plate
- using a suction pump.
- applying aseline to seal the bottom of jar.
- creating vacuum
Oxygen liberated during photosynthesis comes from
