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प्रश्न
Explain in your own words with suitable examples.
How is excretion in plants useful to human beings?
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
Match structures given in Column I with functions given in Column II.
| Column I | Column II | ||
| (i) | Stomata | (a) | Absorption of water |
| (ii) | Xylem | (b) | Transpiration |
| (iii) | Root hairs | (c) | Transport of food |
| (iv) | Phloem | (d) | Transport of water |
| (e) | Synthesis of carbohydrates |
The nephrons discharge their urine at ______.
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?
State whether the following statement is true or false:
Some organisms store wastes in body parts.
Name the two parts of a plant through which its gaseous waste products are released into the air.
What is the role of glomerulus in the kidney?
A dialysis machine contains long tubes coiled in a tank containing dialysing solution
Name the main waste which passes into the dialysing solution.
Answer the following in short.
What is excretion?
Define the following term:
Micturition
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?
Describe in brief how urine is produced in the human body.
Choose the Odd One Out:
Choose the correct option.
Specific gravity of urine would _______ if level of ADH increases.
Choose the correct option.
The minor calyx _______.
Complete the diagram/chart with correct labels/ information. Write the conceptual details regarding it.
Plants use completely different process for excretion as compared to animals. Which one of the following processes is NOT followed by plants for excretion?
Explain the importance of soil for plant growth.
Which of the following is not an example of secretion?
The main nitrogenous waste formed in the human body:
