Water is transported through the xylem using transpiration pull. Evaporation from leaf surfaces creates a negative pressure, pulling water upward. Cohesion, adhesion, and capillary action help maintain continuous upward flow. cbse sample paper 2025 cbse sample paper 2025-26 class 10 science
Discussion Forum Latest Questions
(i) Fish: Two-chambered heart; oxygenated and deoxygenated blood mix before reaching tissues. (ii) Humans: Four-chambered heart prevents mixing, ensuring separate circulation of oxygenated and deoxygenated blood for efficient oxygen supply. cbse sample paper 2025 cbse sample paper 2025-26 class 10 science
After fertilisation, the zygote develops into an embryo, ovules change into seeds, and the ovary grows into a fruit. Meanwhile, petals and sepals usually wither. These transformations mark the development of fruit and seed. class 10 science half yearly 2025 cbse class ...
When light travels from medium A (refractive index 1.6) to medium B (1.8), it enters a denser medium. Light slows down and bends towards the normal, proving A → B causes bending towards the normal. sample paper for class 10 science ...
Arteries have thick, elastic walls to withstand and maintain high pressure from blood pumped by the heart. Veins carry blood at lower pressure, so they contain valves to prevent backflow and ensure unidirectional movement. sample paper for class 10 science board ...