Advertisements
Advertisements
प्रश्न
Differentiate between
tannins and resins
Advertisements
उत्तर
| Tannins | Resins | ||
| 1 | These are a group of complex compounds found in the bark and leaves. | 1 | These are the secretions of many plants like coniferous trees. |
| 2 | Its presence in tea leaves makes tea taste bitter. | 2 | It is used in the production of varnishes and adhesives and perfumes and incense. |
APPEARS IN
संबंधित प्रश्न
The diagram given below shows a section of human kidney. Study the diagram carefully and answer the questions that follow :
(i) Label the parts numbered 1 to 4.
(ii) Why does part ‘2’ have a striped appearance?
(iii) What is the fluid that passes down part ‘4’? Name the main nitrogenous waste present in it.
(iv) Mention the structural and functional units of kidneys.
(v) Name the two major steps in the formation of the fluid mentioned in Q.5 (a) (iii).
Name a waste gas released by the plants only during the night time.
A dialysis machine contains long tubes coiled in a tank containing dialysing solution
What does the dialysing solution contain?
What are the methods used by plants to get rid of their waste products?
What is meant by dialysis? What type of patients are put on dialysis?
What is dialysis? Under what condition is it carried out?
The diagram below represents a mammalian kidney tubule (nephron) and its blood supply. Parts indicated by the guidelines 1 to 8 are as follows:
1. U-shaped loop of Henle
2. Proximal convoluted tubule with blood capillaries
3. Bowman’s capsule
4. Afferent arteriole from the renal artery
5. Glomerulus
6. Venule to the renal vein
7. Collecting tubule
8. Distal convoluted tubule with blood capillaries Study the diagram and answer the following questions in each case:
(i) Where does ultrafiltration take place?
(ii) Which structure contains the lowest concentration of urea?
(iii) Which structure contains the highest concentration of urea?
(iv) Which structure contains the lowest concentration of glucose?
(v) Where is the most water reabsorbed?
Choose the correct option.
What is micturition?
Among the following animals, the best conserver of water is ______.
The main nitrogenous waste formed in the human body:
