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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
State the exact location of the Loop of Henle.
The diagram given below shows the male urinogenital system of a human being. Study the diagram and answer the questions that follow:
(i) Label the parts numbered 1 to 8.
(ii) Name the corresponding structure of part (4) in female reproductive system.
(iii) What is the role of part 7?
What is the name of the tubes which connect the kidneys to bladder?
Name the following:
The part of kidney tubules where the term urine is first used for the fluid in it.
Name the following:
The vein in which urea concentration is maximum
Write down the functional activity of the following parts,
Renal artery ………………
Define the following term:
Osmoregulation
The following diagram represents a mammalian kidney tubule (nephron) and its blood supply.
Parts indicated by the guidelines 1 to 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:
Where does ultrafiltration take place?
Choose the odd one out in the following series:
Proximal convoluted duct, loop of Henle, vein.
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?
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?
Study the diagram given alongside and then answer the question that follow:
Name the parts labelled 1, 2, 3, and 4.
Choose the correct option.
Which one of the following organisms excrete waste through nephridia?
When uric acid is produced in excess, it gets deposited in joints, resulting in ____________.
Plants use completely different process for excretion as compared to animals. Which one of the following processes is NOT followed by plants for excretion?
Why is the rate of breathing in aquatic organisms much faster than in terrestrial organisms?
The main nitrogenous waste formed in the human 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.
