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Meristematic tissues divide repeatedly. What property of their cells allows them to do this? (i) They have thick walls for protection. (ii) They contain large vacuoles that store nutrients. (iii) They have thin walls, dense cytoplasm and large prominent nucleus. (iv) They are functionally differentiated cells.
The correct answer is (iii) thin walls, dense cytoplasm and large prominent nucleus. Meristematic cells remain actively involved in repeated cell division. Thin walls allow easy division, dense cytoplasm supports high metabolic activity and the large nucleus controls growth and cell functions efficiRead more
The correct answer is (iii) thin walls, dense cytoplasm and large prominent nucleus. Meristematic cells remain actively involved in repeated cell division. Thin walls allow easy division, dense cytoplasm supports high metabolic activity and the large nucleus controls growth and cell functions efficiently. These characteristics help plants grow continuously in roots, shoots and other growing regions.
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 lessIf a plant is unable to transport food from leaves to roots which tissue is malfunctioning? (i) Xylem (ii) Phloem (iii) Epidermis (iv) Sclerenchyma
The correct answer is (ii) phloem. Phloem tissue is responsible for transporting food materials, especially sugars produced during photosynthesis, from leaves to other plant parts including roots, stems and fruits. If phloem stops functioning properly, food distribution becomes disturbed, leading toRead more
The correct answer is (ii) phloem. Phloem tissue is responsible for transporting food materials, especially sugars produced during photosynthesis, from leaves to other plant parts including roots, stems and fruits. If phloem stops functioning properly, food distribution becomes disturbed, leading to poor growth, reduced storage and weakening of the plant’s metabolic and developmental processes.
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 are the epithelial tissues that line an animal’s internal organs usually only one or a few cells thick? (i) To store food efficiently. (ii) To provide maximum strength. (iii) To allow quick exchange of materials across them. (iv) To reduce friction.
The correct answer is (iii) to allow quick exchange of materials across them. Epithelial tissues lining organs like lungs and intestines are usually very thin so that gases, nutrients and wastes can diffuse rapidly. This thin structure increases efficiency in absorption, secretion and exchange proceRead more
The correct answer is (iii) to allow quick exchange of materials across them. Epithelial tissues lining organs like lungs and intestines are usually very thin so that gases, nutrients and wastes can diffuse rapidly. This thin structure increases efficiency in absorption, secretion and exchange processes, helping organs perform important physiological functions smoothly and effectively within the body.
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 lessYou can perform these two jumps (Fig. 3.21): Straight-leg jump — keep knees and ankles stiff. Normal jump — bend knees and ankles naturally. How did your ankle, knee and hip positions differ between the two jumps?
During a straight-leg jump, the ankles, knees and hips stay stiff with very little bending, making movement less flexible and more forceful. In a normal jump, knees and ankles bend naturally and hips flex slightly. This coordinated bending absorbs shock, improves balance, reduces stress on joints anRead more
During a straight-leg jump, the ankles, knees and hips stay stiff with very little bending, making movement less flexible and more forceful. In a normal jump, knees and ankles bend naturally and hips flex slightly. This coordinated bending absorbs shock, improves balance, reduces stress on joints and muscles and allows smoother, safer and more efficient body movement.
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 type of joint is involved when you bend your knees and ankles? (i) Ball and socket (ii) Hinge (iii) Pivot
The correct answer is (ii) hinge joint. Hinge joints permit movement mainly in one plane, allowing bending and straightening actions. The knee and ankle joints work like door hinges, providing controlled movement and stability. These joints help in activities such as walking, running, jumping and maRead more
The correct answer is (ii) hinge joint. Hinge joints permit movement mainly in one plane, allowing bending and straightening actions. The knee and ankle joints work like door hinges, providing controlled movement and stability. These joints help in activities such as walking, running, jumping and maintaining posture while limiting unnecessary sideways movements that could cause injury.
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