(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)
Mitochondria produce energy in the form of ATP through cellular respiration. If all mitochondria are removed, the cell will not be able to generate energy. As a result, essential processes like metabolism, transport and synthesis will stop. This will lead to cell death because the cell cannot survivRead more
Mitochondria produce energy in the form of ATP through cellular respiration. If all mitochondria are removed, the cell will not be able to generate energy. As a result, essential processes like metabolism, transport and synthesis will stop. This will lead to cell death because the cell cannot survive without energy.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
Contact inhibition is the phenomenon that prevents tumor formation in humans by stopping cell division when cells touch each other. In cancer, this control is lost. Plants can also develop tumors, such as galls, due to uncontrolled growth. However, plant tumors usually remain localized and do not spRead more
Contact inhibition is the phenomenon that prevents tumor formation in humans by stopping cell division when cells touch each other. In cancer, this control is lost. Plants can also develop tumors, such as galls, due to uncontrolled growth. However, plant tumors usually remain localized and do not spread like malignant tumors in animals.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
Proteins are synthesised in ribosomes on rough endoplasmic reticulum, while lipids are made in smooth endoplasmic reticulum. These materials are transported to the Golgi apparatus, where they are modified and packed into vesicles. The vesicles move to the cell membrane and fuse with it, forming membRead more
Proteins are synthesised in ribosomes on rough endoplasmic reticulum, while lipids are made in smooth endoplasmic reticulum. These materials are transported to the Golgi apparatus, where they are modified and packed into vesicles. The vesicles move to the cell membrane and fuse with it, forming membrane components.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
If gametes are formed by mitosis, they will contain the full set of chromosomes instead of half. During fertilisation, the chromosome number would double, leading to abnormal cells. This would disrupt genetic balance and cause serious developmental problems. Meiosis is essential to maintain the corrRead more
If gametes are formed by mitosis, they will contain the full set of chromosomes instead of half. During fertilisation, the chromosome number would double, leading to abnormal cells. This would disrupt genetic balance and cause serious developmental problems. Meiosis is essential to maintain the correct chromosome number in sexually reproducing organisms.
For more NCERT Solutions of Class 9 Science Exploration Chapter 2 Cell: The Building Block of Life (2026-27)
A 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 lessWhat outcome do you expect, if all the mitochondria are removed from a eukaryotic cell?
Mitochondria produce energy in the form of ATP through cellular respiration. If all mitochondria are removed, the cell will not be able to generate energy. As a result, essential processes like metabolism, transport and synthesis will stop. This will lead to cell death because the cell cannot survivRead more
Mitochondria produce energy in the form of ATP through cellular respiration. If all mitochondria are removed, the cell will not be able to generate energy. As a result, essential processes like metabolism, transport and synthesis will stop. This will lead to cell death because the cell cannot survive without energy.
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 lessWhich phenomenon inhibits the formation of tumors in the human body? Can plants also develop tumors? Explain.
Contact inhibition is the phenomenon that prevents tumor formation in humans by stopping cell division when cells touch each other. In cancer, this control is lost. Plants can also develop tumors, such as galls, due to uncontrolled growth. However, plant tumors usually remain localized and do not spRead more
Contact inhibition is the phenomenon that prevents tumor formation in humans by stopping cell division when cells touch each other. In cancer, this control is lost. Plants can also develop tumors, such as galls, due to uncontrolled growth. However, plant tumors usually remain localized and do not spread like malignant tumors in animals.
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 lessThe cell membrane of a cell is made up of proteins and lipids. Which cell organelles help in the synthesis of cell membrane? Write the path of these compounds from their site of synthesis to the cell membrane and show this through a labelled diagram.
Proteins are synthesised in ribosomes on rough endoplasmic reticulum, while lipids are made in smooth endoplasmic reticulum. These materials are transported to the Golgi apparatus, where they are modified and packed into vesicles. The vesicles move to the cell membrane and fuse with it, forming membRead more
Proteins are synthesised in ribosomes on rough endoplasmic reticulum, while lipids are made in smooth endoplasmic reticulum. These materials are transported to the Golgi apparatus, where they are modified and packed into vesicles. The vesicles move to the cell membrane and fuse with it, forming membrane components.
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 lessWhat would happen if gametes are formed by mitotic divisions?
If gametes are formed by mitosis, they will contain the full set of chromosomes instead of half. During fertilisation, the chromosome number would double, leading to abnormal cells. This would disrupt genetic balance and cause serious developmental problems. Meiosis is essential to maintain the corrRead more
If gametes are formed by mitosis, they will contain the full set of chromosomes instead of half. During fertilisation, the chromosome number would double, leading to abnormal cells. This would disrupt genetic balance and cause serious developmental problems. Meiosis is essential to maintain the correct chromosome number in sexually reproducing organisms.
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