Plugging a leak in a blood vessel is essential to prevent entry of pathogens and maintain blood circulation. The blood component responsible is platelets, which stick to the damaged site, release clotting factors and form a temporary plug, eventually leading ...
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The phloem in plants transports food, mainly sucrose, from the leaves where it is produced to all other parts of the plant, including roots, stems and fruits, supplying energy and materials necessary for growth, storage and development. Download cbse sample paper ...
The transport system in plants is slower than in animals because plants lack a pumping heart; movement of water, minerals and food occurs mainly through osmosis, diffusion and transpiration pull, which are slower processes compared to the rapid blood circulation ...
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 ...
The ozone layer began depleting sharply in the 1980s due to CFCs and other ozone-depleting substances, not merely the natural formation of ozone. While oxygen atoms do combine with O₂ to form ozone, this process does not explain the rapid ...