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Sohan designed an experiment for the regeneration of sugarcane, where he used cuttings to grow sugarcane. He used two types of cuttings, type ‘A’ and type ‘B’ (Fig. 3.23). After a few weeks, type ‘B’ cuttings sprouted and developed into sugarcane plants, whereas the type ‘A’ cuttings did not sprout. (i) Why were the type ‘B’ cuttings able to grow as sugarcane but type ‘A’ could not? (ii) What difference was present in type ‘B’ compared to type ‘A’? (iii) What observation or measurement was made to determine whether this change had an effect? (iv) What parameters should be kept the same for both types of cuttings to ensure a fair comparison?
(i) Type B cuttings developed into sugarcane plants because they contained nodes with active intercalary meristem capable of cell division and regeneration. (ii) Type B had buds or nodes, unlike type A. (iii) Growth, sprouting and shoot formation were observed to measure effects. (iv) Soil type, watRead more
(i) Type B cuttings developed into sugarcane plants because they contained nodes with active intercalary meristem capable of cell division and regeneration.
(ii) Type B had buds or nodes, unlike type A.
(iii) Growth, sprouting and shoot formation were observed to measure effects.
(iv) Soil type, water supply, sunlight, temperature, cutting size and growth duration should remain the same for fair comparison.
For more NCERT Solutions of Class 9 Science Exploration Chapter 3 Tissues in Action Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-3/
See lessAamrapali observed that a young mango sapling’s stem bends flexibly during monsoon winds and does not break. Which tissue is responsible for this flexibility? Predict and provide your explanation of the impact if the existing tissue was replaced by sclerenchyma.
The flexibility of the young mango sapling’s stem is due to collenchyma tissue, which has unevenly thickened walls containing pectin. This tissue provides support with flexibility, helping the stem bend during strong winds without damage. If sclerenchyma replaced collenchyma, the stem would become hRead more
The flexibility of the young mango sapling’s stem is due to collenchyma tissue, which has unevenly thickened walls containing pectin. This tissue provides support with flexibility, helping the stem bend during strong winds without damage. If sclerenchyma replaced collenchyma, the stem would become hard, rigid and brittle because sclerenchyma has thick lignified walls, making the sapling more likely to break.
For more NCERT Solutions of Class 9 Science Exploration Chapter 3 Tissues in Action Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-3/
See lessWhich function of the tree would be hampered if the tissues beneath the bark were severely damaged?
The major function hampered would be the transportation of food materials within the plant. Phloem tissues beneath the bark carry sugars and nutrients from leaves to roots and other organs. Severe damage disrupts this transport system, causing starvation of roots and other tissues. This weakens growRead more
The major function hampered would be the transportation of food materials within the plant. Phloem tissues beneath the bark carry sugars and nutrients from leaves to roots and other organs. Severe damage disrupts this transport system, causing starvation of roots and other tissues. This weakens growth, reduces energy supply and may eventually kill the tree.
For more NCERT Solutions of Class 9 Science Exploration Chapter 3 Tissues in Action Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-3/
See lessWhat assumptions are you making to answer the questions above? How would the answer change if your assumptions are also changed?
The answers assume that debarking mainly damaged bark and phloem tissues while xylem remained mostly unaffected. Under this assumption, food transport is disturbed more than water transport. If assumptions change and deeper tissues like xylem are also damaged, water transport and support would failRead more
The answers assume that debarking mainly damaged bark and phloem tissues while xylem remained mostly unaffected. Under this assumption, food transport is disturbed more than water transport. If assumptions change and deeper tissues like xylem are also damaged, water transport and support would fail too. Partial debarking may cause only limited effects, allowing the tree to survive longer.
For more NCERT Solutions of Class 9 Science Exploration Chapter 3 Tissues in Action Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-3/
See lessVibha claims to her friend Neha that, “Meristematic cells are located only at the root and shoot apices”. What do you think about this statement? What question can Neha ask Vibha to help her understand further if the statement is incorrect?
Vibha’s statement is incorrect because meristematic tissues are not limited only to root and shoot apices. Plants also have lateral meristem for increasing girth and intercalary meristem for regrowth after cutting. Neha can ask Vibha how grasses regrow after mowing or how tree stems become thicker iRead more
Vibha’s statement is incorrect because meristematic tissues are not limited only to root and shoot apices. Plants also have lateral meristem for increasing girth and intercalary meristem for regrowth after cutting. Neha can ask Vibha how grasses regrow after mowing or how tree stems become thicker if meristematic tissues are present only at apical regions of plants.
For more NCERT Solutions of Class 9 Science Exploration Chapter 3 Tissues in Action Question Answer (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-3/
See less