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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
Blood in the renal artery or renal vein (Which one has more urea?)
Describe the mechanism of urine formation in human excretory system. Draw a labelled diagram to illustrate your answer.
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Nitrogenous wastes in the urine are in the form of urea and .....................
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.................. produces bile pigments from the heamoglobin of broken RBCs.
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What happens if one kidney is removed from the body of human being?
Given below is a diagram of a human kidney, cut open longitudinally. Answer the following:
(i) Give definition of excretion.
(ii) Name the unit of kidney.
(iii) Why does the cortex of kidney show dotted appearance?
(iv) List the functions of the kidney.
Given below is a highly simplified diagram of the human kidney cut open longitudinally. Answer the question that follow:
Why does the cortex of the kidney show a dotted appearance?
Given below is a highly simplified diagram of the human kidney cut open longitudinally. Answer the question that follow:
Mention two functions of the kidney.
Name the Following
The process by which kidneys regulate the water content of the body.
Choose the Odd One Out:
Choose the correct option.
Deproteinised plasma is not found in ______.
Among the following animals, the best conserver of water is ______.
Certain organisms that are aquatic in habitat, tolerate only a narrow range of salinity. What term is given to such animals?
Name the organs that store and release the urine.
Name the following:
The main nitrogenous waste formed in the body.
The statement given below is false. Rewrite the correct form of the statement by changing the underlined word.
The pigment urochrome is the breakdown product of the haemoglobin of dead RBCs.
Choose the odd one out in the following set and write the category for the remaining term:
Ammonia, urea, excess sodium chloride, uric acid
