What is needed by every living organism for existence?

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Multiple Choice

What is needed by every living organism for existence?

Water is essential because it enables virtually all biological processes. It acts as the universal solvent, dissolving nutrients and gases so they can move into and out of cells, and it is where most metabolic reactions occur, including hydrolysis and dehydration synthesis. Water also helps transport substances through organisms, supports digestion and waste removal, and stabilizes temperature and cell structure, keeping cells hydrated and functioning. While oxygen fuels energy production for many organisms, some survive without it, and sunlight is only critical for those that rely on photosynthesis. The idea of “non-biological substances” is too vague to capture what life actually needs. In short, water provides the medium and participation required for life’s chemistry.

Water is essential because it enables virtually all biological processes. It acts as the universal solvent, dissolving nutrients and gases so they can move into and out of cells, and it is where most metabolic reactions occur, including hydrolysis and dehydration synthesis. Water also helps transport substances through organisms, supports digestion and waste removal, and stabilizes temperature and cell structure, keeping cells hydrated and functioning. While oxygen fuels energy production for many organisms, some survive without it, and sunlight is only critical for those that rely on photosynthesis. The idea of “non-biological substances” is too vague to capture what life actually needs. In short, water provides the medium and participation required for life’s chemistry.

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