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प्रश्न
Explain the importance of soil for plant growth.
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उत्तर
Soil is very important for the growth of the plant for the following reasons -
- Soil provides the base for the growth of the plants and provides a platform for the penetration of roots.
- It acts as a reservoir of the water.
- Soil has different minerals essential for the growth of the plant. Soil is the only medium from which soil obtains nutrients.
- Soil has organic materials essential for the growth of the plants.
- Soil has microorganisms that have a symbiotic relationship with the plant and these microbes assist the plant in their growth and life processes.
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संबंधित प्रश्न
Name the Following
The organ which produces urea.
Give biological reasons for the following statements: There is frequent urination in winter than in summer
Write the functions of the Urinary bladder
Why do some people need to use a dialysis machine? What does the machine do?
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Name the main waste which passes into the dialysing solution.
The excretory unit in the human excretory system is called:
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tannins and resins
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Correct and rewrite the statements by changing the biological term that is underlined for the statement:
The kidney is composed of number of neurons.
Choose the odd one out in the following series:
Renal fat, renal capsule, nerve.
The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Parts indicated by the guidelines 1to 8 are as follows:
1. Afferent arteriole from renal artery
2. Efferent arteriole
3. Bowman's capsule
4. Glomerulus
5. Proximal convoluted tubule with blood capillaries
6. Distal convoluted tubule with blood capillaries
7. Collecting tubule
8. U-shaped loop of Henle
Study the diagram and answer the question that follow:
Which structure contains the lowest concentration of urea?
The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Parts indicated by the guidelines 1to 8 are as follows:
1. Afferent arteriole from renal artery
2. Efferent arteriole
3. Bowman's capsule
4. Glomerulus
5. Proximal convoluted tubule with blood capillaries
6. Distal convoluted tubule with blood capillaries
7. Collecting tubule
8. U-shaped loop of Henle
Study the diagram and answer the question that follow:
Which structure (normally) contains the lowest concentration of glucose?
The diagram below represents a mammalian kidney tubule (nephron) and its blood supply. Parts indicated by the guidelines 1 to 8 are as follows:
1. U-shaped loop of Henle
2. Proximal convoluted tubule with blood capillaries
3. Bowman’s capsule
4. Afferent arteriole from the renal artery
5. Glomerulus
6. Venule to the renal vein
7. Collecting tubule
8. Distal convoluted tubule with blood capillaries Study the diagram and answer the following questions in each case:
(i) Where does ultrafiltration take place?
(ii) Which structure contains the lowest concentration of urea?
(iii) Which structure contains the highest concentration of urea?
(iv) Which structure contains the lowest concentration of glucose?
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Choose the Odd One Out:
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Glucose, excess water, amino acids, urea, carbon dioxide, excess common salt, glycogen, uric acid.
Give two examples of the following:
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Choose the odd one out in the following set and write the category for the remaining terms:
