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प्रश्न
Differentiate between
tannins and resins
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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. |
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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 |
Name the two waste products of the human body which are produced in the body cells.
Describe the mechanism of urine formation in human excretory system. Draw a labelled diagram to illustrate your answer.
Fill in the blank.
....................... are present in the stem of pine tree that make the pinewood strong and durable.
Given below is a diagram of a human kidney, cut open longitudinally. Answer the following:
(i) Give definition of excretion.
(ii) Name the unit of kidney.
(iii) Why does the cortex of kidney show dotted appearance?
(iv) List the functions of the kidney.
Differentiate between:
Renal cortex and Renal medulla.
Draw a labeled diagram of the human kidney as seen in a longitudinal section.
Choose the correct option.
Deproteinised plasma is not found in ______.
The tadpole of frog lives in water, hence its mode of excretion is ______.
In order to maintain homeostasis or constant internal environment . ______' is essential.
