Chemical Coordination Short Ans Concise Class 10 ICSE Biology Selina Solutions Ch-7. In this article you will get the solutions of Short Answer Type Questions as council latest syllabus. Visit official website CISCE for detail information about ICSE Board Class-10 Biology.
Chemical Coordination Short Ans Concise Class 10 ICSE Biology Selina Solutions Ch-7
| Board | ICSE |
| Subject | Biology |
| Class | 10 |
| Book | Selina Concise |
| Chapter-7 | Chemical Coordination |
| Topics | Short Answer Type Questions |
| Session | 2024-25 |
Chemical Coordination Short Answer Type
Que-1: Match the items in column A with those of column B
| Column A | Column B |
|---|---|
| (a) Auxin | (i) apical dominance |
| (b) Gibberellin | (ii) cell-division |
| (c) Cytokinin | (iii) fruit ripening |
| (d) Ethylene | (iv) internodal elongation |
Sol:
| Column A | Column B |
|---|---|
| (a) Auxin | (i) apical dominance |
| (b) Gibberellin | (iv) internodal elongation |
| (c) Cytokinin | (ii) cell division |
| (d) Ethylene | (iii) fruit ripening |
Que-2: Complete the following sentences
(a) Growth of root towards water is …………… .
(b) …………… hormone inhibits apical dominance.
(c) …………… and …………… induce chemotropism of angiosperms and gymnosperms.
(d) …………… of sweet peas exhibit thigmotropism.
(e) …………… is also called as “stress hormone”.
Sol:
(a) Growth of root towards water is hydrotropism .
(b) Cytokinins hormone inhibits apical dominance.
(c) Sugars and peptones induce chemotropism of angiosperms and gymnosperms.
(d) Tendrils of sweet peas exhibit thigmotropism.
(e) Abscisic acid is also called as “stress hormone”.
Que-3: How is movement in plants different from that in animals?
Sol: Differences between movement in plants and animals
| Movement in plants | Movement in animals |
|---|---|
| Plant movements are often related to growth. | Animal movements are not related to growth. |
| Plant movements are confined to only some plant parts. | Animal movements involve movement of the entire body. |
| No muscles are involved in plant movements. | Muscles are involved in animal movements. |
| It involves bending, twisting and elongation of plant parts. | It involves displacement from one place to another. |
| Movement is said to be non-locomotory. | Movement is said to be locomotory. |
| Plants generally move to secure support, capture food or to find water or soil nutrients. | Animals generally move to find mates, for protection from environmental changes and to capture food. |
Que-4: Name the stimulus which causes the following movements in plants: phototropism, thigmotropism, hydrotropism and geotropism.
Sol:
- Phototropism → Light
- Thigmotropism → Touch
- Hydrotropism → Water
- Geotropism → Gravity
Que-5: Name the following.
(a) A hormone that stimulates growth by cell division.
(b) A growth-retarding hormone in plants.
(c) The main auxin found in most plants.
Sol:
(a) Cytokinin
(b) Abscisic acid
(c) Indole 3-acetic acid (IAA)
Extra Common Que -Why Sunflower bend toward Sun?
Answer:– The best-known response is the phototropic response. Proteins called phototropism sense blue light falling unevenly on a seedling and the plant’s growth hormones are redistributed. This ultimately causes it to bend towards the light
–: End of Chemical Coordination Short Ans Concise Class 10 ICSE Biology Selina Solutions Ch-7 :–
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