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If 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 lessIn each of the following cases (A, B, C and D), choose the correct option as given below: (i) Both (A) and (R) are true and (R) is the correct explanation of (A). (ii) Both (A) and (R) are true, but (R) is not the correct explanation of (A). (iii) (A) is true, but (R) is false. (iv) (A) is false, but (R) is true. A. Assertion: Epithelium is well-suited for gas exchange in the lungs. Reason: It consists of multiple layers of tall cells that slow down diffusion. B. Assertion: Cardiac muscle can contract continuously without fatigue. Reason: Cardiac muscle cells have a high number of mitochondria and an abundant blood supply. C. Assertion: Tendons connect bone to bone and allow joint movement. Reason: Tendons are made of tough connective tissue that transmits force from muscle to bone. D. Assertion: In a hinge joint, movement occurs primarily in one plane. Reason: The bone ends are shaped to allow sliding in all directions
A.(iii) Epithelium supports gas exchange, but lungs have thin simple epithelium, not multiple tall layers. B. (i) Cardiac muscles resist fatigue because of many mitochondria and rich blood supply. C. (iv) Tendons connect muscles to bones, not bones to bones. D. (iii) Hinge joints move mainly in oneRead more
A.(iii) Epithelium supports gas exchange, but lungs have thin simple epithelium, not multiple tall layers.
B. (i) Cardiac muscles resist fatigue because of many mitochondria and rich blood supply.
C. (iv) Tendons connect muscles to bones, not bones to bones.
D. (iii) Hinge joints move mainly in one plane, but they do not allow sliding in all directions like ball and socket joints.
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