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Vacuoles — The organelles for storage and support. Explain.
Vacuoles are membrane-bound organelles that store water, minerals, sugars and waste products. In plant cells, a large central vacuole maintains turgor pressure, which keeps the cell firm and supports the plant structure. In animal cells, vacuoles are smaller and help in temporary storage and transpoRead more
Vacuoles are membrane-bound organelles that store water, minerals, sugars and waste products. In plant cells, a large central vacuole maintains turgor pressure, which keeps the cell firm and supports the plant structure. In animal cells, vacuoles are smaller and help in temporary storage and transport of substances.
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 lessDo white flowers contain any pigment? Give reasons
Yes, white flowers may contain pigments, but they do not have pigments that absorb visible light strongly. Instead, they reflect most of the light, giving a white appearance. In some cases, the absence of pigments also results in white colour. Thus, white flowers may either lack pigments or containRead more
Yes, white flowers may contain pigments, but they do not have pigments that absorb visible light strongly. Instead, they reflect most of the light, giving a white appearance. In some cases, the absence of pigments also results in white colour. Thus, white flowers may either lack pigments or contain colourless ones.
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 lessDraw a well-labelled schematic diagram of a plant or an animal cell using these clues — (i) Nucleus appears as a dark and round body inside the cell. (ii) ER spreads like a network of extended nuclear envelope. (iii) Mitochondria and chloroplasts are rod shaped.
A well-labelled diagram of a cell should include a dark, round nucleus at the centre, endoplasmic reticulum as a network extending from it and rod-shaped mitochondria and chloroplasts in plant cells. Other parts like cell membrane, cytoplasm and vacuole should also be shown clearly. Proper labellingRead more
A well-labelled diagram of a cell should include a dark, round nucleus at the centre, endoplasmic reticulum as a network extending from it and rod-shaped mitochondria and chloroplasts in plant cells. Other parts like cell membrane, cytoplasm and vacuole should also be shown clearly. Proper labelling helps in understanding cell structure and organisation effectively.
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 lessCan you identify which stage comes first during cell division?
The first stage of cell division is interphase. During this stage, the cell grows, carries out normal functions and duplicates its DNA. It prepares itself for division. After interphase, the cell enters mitosis, where actual division takes place. Interphase is important because it ensures that eachRead more
The first stage of cell division is interphase. During this stage, the cell grows, carries out normal functions and duplicates its DNA. It prepares itself for division. After interphase, the cell enters mitosis, where actual division takes place. Interphase is important because it ensures that each new cell receives the correct genetic material.
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 lessDo you observe the cells of the onion root tip? Are they similar in structure? Do you find any structural differences in these cells? If yes, why is it so?
Yes, onion root tip cells can be observed under a microscope. They are not all similar in structure because they are at different stages of cell division. Some cells may show chromosomes, while others may not. These differences occur because the cells are actively dividing and each stage of divisionRead more
Yes, onion root tip cells can be observed under a microscope. They are not all similar in structure because they are at different stages of cell division. Some cells may show chromosomes, while others may not. These differences occur because the cells are actively dividing and each stage of division shows different structural features.
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