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प्रश्न
Explain in your own words with suitable examples.
How is excretion in plants useful to human beings?
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उत्तर
Excretion in plants results in the production of various kinds of excreta which are waste for the plant but are equally important for human use.
The following examples are helpful in proving the above fact:
- Oxygen which is an excretory product of photosynthesis is an absolute requirement for human beings to survive on Earth.
- Tannin is a waste plant product which is stored in leaves and bark. it is used in making tea all over the world.
- Plants store waste products in their leaves and bark which are shed off regularly. These shed-offs are used to make manure.
- Gum and resin are waste materials for plants but they have various uses for man.
- Essential oils are also waste products of plants which are stored in their leaves. These essential oils are used for various purposes by us.
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संबंधित प्रश्न
The diagram given below shows a section of human kidney. Study the diagram carefully and answer the questions that follow :
(i) Label the parts numbered 1 to 4.
(ii) Why does part ‘2’ have a striped appearance?
(iii) What is the fluid that passes down part ‘4’? Name the main nitrogenous waste present in it.
(iv) Mention the structural and functional units of kidneys.
(v) Name the two major steps in the formation of the fluid mentioned in Q.5 (a) (iii).
What are the methods used by plants to get rid of their waste products?
Draw a neat labelled diagram of the human excretory system.
What is the function of excretory system in humans?
If a patient is out on dialysis, he is most likely suffering from a severe ailment of the ______.
The excretory unit in the human excretory system is called ______.
The procedure of cleaning the blood of a person by using a kidney machine is known as ______.
Differentiate between
tannins and resins
Why is it necessary to maintain a normal osmotic concentration of the blood?
If you donate one kidney to a needy patient, would it cause any harm to you? Give reason.
Study the diagram given alongside and then answer the question that follow:
Name the stages involved in the formation of urine.
Study the diagram given alongside and then answer the question that follow:
What is the technical term given to the process occurring in 2 and 3? Briefly describe the process.
Answer the following question:
Explain the human excretory system with the help of a suitable diagram.
Choose the Odd One Out:
Choose the correct option.
Visceral layer : Podocytes :: PCT : ________.
What is the purpose of making urine in the human body?
Given below is a list of substances - select the ones that need to be eliminated from the body.
Glucose, excess water, amino acids, urea, carbon dioxide, excess common salt, glycogen, uric acid.
Give two examples of the following:
Nitrogenous waste
The main nitrogenous waste formed in the human body:
