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प्रश्न
What are the methods used by plants to get rid of excretory products?
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उत्तर १
Plants can get rid of excess of water by transpiration. Waste materials may be stored in the cell vacuoles or as gum and resin, especially in old xylem. It is also stored in the leaves that later fall off.
उत्तर २
- Photosynthetic and respiratory wastes such as oxygen and carbon dioxide are used for respiration and photosynthesis. Any excess is expelled through the stomata.
- Excess water is removed through the process of transpiration.
- Waste products may be stored in leaves, bark, or other parts of the plant, which later fall off, removing the waste from metabolically active areas.
- In some plants, metabolic by-products are stored as crystals.
- Several substances, such as resins, tannins, and alkaloids, such as morphine and quinine, are also plant wastes, although they benefit humans.
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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 |
What is the name of the tubes which connect the kidneys to bladder?
Tick the most appropriate answer.
The process of removing waste from the body is called
Name the following:
The tuft of capillaries inside the Bowman's capsule.
Name the following:
The vein in which urea concentration is maximum
Define the following term:
Micturition
Look at the figure given below. It is a section of human kidney as seen from the front.
Which area/part (give its name and number given on the diagram) which contains the following:
(i) Malpighian capsule
(ii) The pyramids
(iii) Freshly collected urine
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 contains the highest concentration of urea?
Answer the following question:
Explain the human excretory system with the help of a suitable diagram.
Explain the functioning of kidney.
Differentiate between:
The Renal artery and the Renal vein.
Study the diagram given below and then answer the questions that follow:
 |
- Name the region in the kidney where the above structure is present?
- Name the parts labelled 1, 2, 3 and 4.
- Name the stages involved in the formation of urine.
- What is the technical term given to the process occurring in 2 and 3? Briefly describe the process.
Name the Following
The structural and functional units of kidney
Write the functional activity of the following structure: Aldosterone
Choose the correct option.
Which one of the following organisms would spend maximum energy in the production of nitrogenous waste?
Complete the diagram/chart with correct labels/ information. Write the conceptual details regarding it.
Complete the diagram/chart with correct labels/ information. Write the conceptual details regarding it.
Name the organs that store and release the urine.
Name the following:
The main nitrogenous waste formed in the body.
An organ that produces urea:
