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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
State whether the following statement is true or false:
Some organisms store wastes in body parts.
Fill in the following blank with suitable word:
The organs which extract the nitrogenous wastes from the blood are ..........
What does the bladder in our body do?
With which human organ system (or human systems) is glomerulus associated?
What is the function of excretory system in humans?
Fill in the blank :
Nitrogenous wastes in the urine are in the form of urea and .....................
Why is excretion necessary in living beings?
State if the following statement is true or false. Correct the statement if it is false.
Liver produces bile pigments from the hemoglobin of broken RBCs.
Write down the functional activity of the following parts,
Henle's loop ………………
Define the following term :
Renal pelvis
Explain in your own words with suitable examples.
How does excretion occur in human beings?
Given below is a highly simplified diagram of the human kidney cut open longitudinally. Answer the question that follow:
Name the functional units of the kidneys.
Describe in brief how urine is produced in the human body.
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?
(v) Where is the most water reabsorbed?
Name the Following
The division of the kidney which is light in colour and subdivided into conical renal pyramids.
Answer the following question.
Name any one guanotelic organism.
Among the following animals, the best conserver of water is ______.
What would happen if green plants disappeared from earth?
Give two examples of the following:
Nitrogenous waste
Give two examples of the following:
Water-soluble vitamins
