Bones contribute about 12–15 percent of an adult human’s body weight. This percentage may vary depending on age, gender and body composition. Bones provide support, protection, posture and structure, forming the framework of the musculoskeletal system.
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Bones contribute about 12–15 percent of body weight in adults. Muscles contribute nearly 30–50 percent in males and 30–40 percent in females. Together, bones and muscles form the musculoskeletal system that supports movement and posture.
The correct option is (ii) phloem. Phloem transports food prepared in leaves to roots and other plant parts. Malfunctioning phloem disrupts movement of sugars and nutrients, affecting growth, storage and normal metabolic activities in plants.
A. (iii) Assertion true, Reason false. B. (i) Both true, Reason explains Assertion. C. (iv) Assertion false, Reason true. D. (iii) Assertion true, Reason false. These answers depend on tissue structure, muscle function and joint movement characteristics.
As the number of annual rings increases, the diameter of the teak tree also increases. Annual rings form each year due to lateral meristem activity, showing that tree girth grows gradually with age and environmental conditions.