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प्रश्न
Where do plants get each of the raw materials required for photosynthesis?
उत्तर
The following raw materials are required for photosynthesis:
- Carbon Dioxide: Plants get CO2 from atmosphere through stomata.
- Water: Plants absorb water from soil through roots and transport to leaves.
- Sunlight: Sunlight, which is absorbed by the chlorophyll and other green parts of the plant.
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संबंधित प्रश्न
How would you test the presence of starch in leaves?
Give a brief description of the process of synthesis of food in green plants.
All animals and fungi are autotrophs.
Why do we boil the leaf in alcohol when we are testing it for starch?
(a) Name the pigment in leaves which absorbs sunlight energy.
(b) What is the colour of this pigment?
Apart from carbon dioxide and water, name four other raw materials which are needed by the plants.
Where is chlorophyll mainly present in a plant?
What is the name of those cells in the leaf of a plant which control the opening and closing of stomata?
Fill in the following blank with suitable word :
All green plants are ....................
Which simple food is prepared first in the process of photosynthesis?
State the various steps involved in the process of photosynthesis.
Why do plants need nitrogen? How do plants obtain nitrogen?
Write a chemical equation to show the process of photosynthesis in plants.
An organism A which cannot move from one place to another, makes a simple food B from the substances C and D available in the environment. This food is made in the presence of a green coloured substance E present in organs F in the presence of light energy in a process called G. Some of the simple food B also gets converted into a complex food H for storage purposes. The food H gives a blue-black colour with dilute iodine solution.
(a) What is (i) organism A (ii) food B, and (iii) food H?
(b) What are C and D?
(c) Name (i) green coloured substance E, and (ii) organ F.
(d) What is the process G?
Why is plant food not produced in any other parts of the plant except the green ones?
Autotrophic organisms include ____________.
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?
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
Two green plants are kept separately in oxygen free containers, one in the dark and other in sunlight. It was observed that plant kept in dark could not survive longer. Give reason for this observation.
