Plants synthesize their own carbohydrates, proteins and fats using sunlight, water, carbon dioxide and minerals through photosynthesis and other metabolic processes, unlike humans who must ingest them. Tiwari Academy provides CBSE Class 10 Sample Papers 2025-26 CBSE Sample Paper Class 10 Science ...
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The cross involves RRyy × rrYY. All F1 offspring inherit the RrYy genotype. Since R (round) is dominant over r (wrinkled) and Y (yellow) is dominant over y (green), all F1 seeds will be round and yellow in appearance. Correct ...
To obtain an image of magnification M = − 1, the image must be real, inverted and of the same size as the object. This happens when the object is placed at twice the focal length of a convex lens. ...
Aluminium does not rust like iron because it forms a protective oxide layer (Al₂O₃) that prevents further corrosion. Its dull appearance can be prevented by polishing or anodizing, which maintains shine. Aluminium is preferred for roofing because it is lightweight, ...
Carbon does not have a strong tendency to lose or gain electrons completely. Instead, it has 4 valence electrons and typically shares electrons with other atoms to achieve a stable configuration. The correct answer is D: A is false but ...