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प्रश्न
What is the law of limiting factors?
उत्तर
Blackman (1905) established the law of limiting factors in connection with photo-synthesis. According to this law when a process is conditioned to its rapidity by a number of separate factors, the rate of the process is limited by the pace of the lowest factor, i.e., the factor which is present in a minimum amount.
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संबंधित प्रश्न
Give appropriate biological/technical terms for the following:
An apparatus that measures the rate of water uptake in a cut shoot due to transpiration.
Differentiate between the following pairs on the basis of what is indicated in the brackets.
Leaf and Liver [form in which glucose is stored]
Give biological explanations for Plants growing in fertilized soil are often found to wilt if the soil is not adequately watered.
The diagram given below represents an experiment to prove the importance of a factor in photosynthesis. Answer the questions that follow :
Give a balanced chemical equation to represent the process of photosynthesis.
State the main functions of the following:
Cytokinins
Name the following:
Three organisms that cannot prepare their own food by photosynthesis.
Fill in the blank:
Xanthophyll is ______ coloured pigment.
Choose the correct answer:
Photosynthesis is more active in ___________
The production of starch, and not glucose, is often used as a measure of photosynthesis in leaves because
The specific function of light energy in the process of photosynthesis is to
Identify the false statements and rewrite them correctly by changing the first or last word only.
Algae are autotrophs.
Complete the following food chains by writing the names of appropriate organisms in the blanks:
Grass → ______ → Snake → ______
All life on earth Would come to an end if there were no green plants.
Draw a neat and well-labeled diagram of the apparatus you would set up to show that oxygen is given out during photosynthesis.
Give technical term:
The part of the chloroplast where the dark reaction of photosynthesis takes place.
Mention, if the following statement is True or False. If false rewrite the wrong statement in its correct form:
Land plants obtain their CO2 from the atmosphere.
Autotrophs use _____,______ and chlorophyll to prepare their own food.
State whether true or false. If false, correct the statement.
Plants lose water when the stomata on leaves are closed.
Study the pictures below and then complete the table by putting a plus (+) if the shoot or root grows towards the stimulus and a minus (-) if it grows away from it.
| Stimulus | Light | Gravity |
| Shoot | + | - |
| Root | ? | + |
1. What happens to the dandelion flower
- During the daytime?
- At night?
2. What is the phenomenon known as?
