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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 |
Why is it necessary to excrete waste products?
Draw the well-labelled diagram of the human excretory system
Name the two parts of a plant through which its gaseous waste products are released into the air.
What job is done by the kidneys?
What do kidneys excrete?
Write True (T) or False (F) for the following statement. Rewrite the false statement in the correct form.
Urine is devoid of blood cells.
Name the following:
The part of kidney tubules where the term urine is first used for the fluid in it.
Study the diagram given alongside and then answer the question that follow:
Name the region in the kidney where the above structure is present?
Choose the correct answer:
Composition of extracellular fluid is regulated by ___________
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:
Where is most water reabsorbed ?
Given below is a highly simplified diagram of the human kidney cut open longitudinally. Answer the question that follow:
Name the functional units of the kidneys.
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.
Choose the correct option.
Which one of the following organisms excrete waste through nephridia?
Hypotonic filtrate is formed in _______.
Complete the diagram/chart with correct labels/ information. Write the conceptual details regarding it.
The habitat of animals that excrete nitrogenous waste in the form of urea.
Explain the importance of soil for plant growth.
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.
