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What causes this increase in girth?
The increase in plant girth occurs because lateral meristematic cells divide repeatedly. These actively dividing cells produce new cells towards the inner and outer sides of the stem in concentric layers. As more cells are added, the stem becomes thicker. This process also forms annual growth ringsRead more
The increase in plant girth occurs because lateral meristematic cells divide repeatedly. These actively dividing cells produce new cells towards the inner and outer sides of the stem in concentric layers. As more cells are added, the stem becomes thicker. This process also forms annual growth rings and provides strength and support to older plants and trees.
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 lessHow do plants grow after being cut?
Plants regrow after being cut due to intercalary meristem present near nodes and internodes. These actively dividing cells continue producing new tissues even after the shoot tip is removed. As a result, new branches and shoots develop again. This ability helps grasses, hedges and many plants regeneRead more
Plants regrow after being cut due to intercalary meristem present near nodes and internodes. These actively dividing cells continue producing new tissues even after the shoot tip is removed. As a result, new branches and shoots develop again. This ability helps grasses, hedges and many plants regenerate quickly after cutting, mowing or grazing by animals.
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 lessWhy do you think that the cell of meristematic tissues lack vacuoles?
Meristematic tissue cells do not contain large vacuoles because they remain actively involved in continuous cell division. These cells require dense cytoplasm and sufficient space for rapid metabolic activities. Vacuoles mainly store materials and occupy large space, which could slow cell division.Read more
Meristematic tissue cells do not contain large vacuoles because they remain actively involved in continuous cell division. These cells require dense cytoplasm and sufficient space for rapid metabolic activities. Vacuoles mainly store materials and occupy large space, which could slow cell division. Therefore, absence of vacuoles helps meristematic cells divide quickly and efficiently for plant growth and development.
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 is the future of the development of synthetic cells using non-living chemicals?
The development of synthetic cells using non-living chemicals has a promising future in science and technology. These cells can be used to produce medicines, vaccines and useful chemicals. They may help clean pollution, generate biofuels and improve healthcare. With further research, synthetic cellsRead more
The development of synthetic cells using non-living chemicals has a promising future in science and technology. These cells can be used to produce medicines, vaccines and useful chemicals. They may help clean pollution, generate biofuels and improve healthcare. With further research, synthetic cells could revolutionise biotechnology, making processes more efficient and sustainable for human benefit.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-2/
See lessA farmer, Deepa, was very happy with the harvest of amla (Indian Gooseberry) and lemons on her farm. However, she could sell only one fourth of the produce in the local market. Recognising that a significant amount of produce may be lost post-harvest, she employed a traditional yet scientifically sound method to extend the shelf life of amla and lemons. She turned perishable produce into profitable products, such as pickles and sharbat. She used the excess produce to prepare pickles, murabbas and sharbat by adding appropriate amounts of salt, sugar or jaggery to small pieces of fruit and their juices. These were then stored in small glass bottles for sale, helping her prevent the wastage of post-harvest produce. This shift from farming to agro-processing would strengthen food security and boost the local economy, creating a sustainable model that cuts waste while increasing her income. Based on the above passage answer the following questions: (i) Which scientific concept has the farmer applied in the preservation of the farm produce? (ii) How does the addition of high concentrations of salt and sugar create an environment that prevents the growth of spoilage-causing bacteria and fungi? (iii) Suggest a healthy recipe of this kind for food preservation. (iv) What are the scientific values addressed in this case?
(i) The concept applied is osmosis. (ii) High concentrations of salt or sugar create a hypertonic environment, drawing water out of microorganisms and inhibiting their growth. (iii) A healthy recipe is amla murabba prepared with jaggery. (iv) The scientific values include sustainability, preventionRead more
(i) The concept applied is osmosis.
(ii) High concentrations of salt or sugar create a hypertonic environment, drawing water out of microorganisms and inhibiting their growth.
(iii) A healthy recipe is amla murabba prepared with jaggery.
(iv) The scientific values include sustainability, prevention of food wastage, resource management, application of scientific knowledge and promoting food security and economic growth.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
https://www.tiwariacademy.com/ncert-solutions/class-9/science/exploration-chapter-2/
See less