Water-soluble vitamins (B, C) are excreted, fat-soluble vitamins (A, D, E, K) are stored, and excess fat-soluble vitamins can accumulate, per nutrition science (e.g., “Modern Nutrition” by Shils).
135
Maintenance of soil fertility without addition of extra nutrition is due to: (CSS-2024)
Soil microbes decompose organic matter, recycling nutrients to maintain fertility, more directly than crop residue or moisture, per soil science (e.g., “Soil Microbiology” by Tate).
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How do scientists know that the Earth’s core is made up of metal? (CSS-2024)
Earth’s average density (~5.5 g/cm³) exceeds surface rock density (~2.7–3.0 g/cm³), indicating a dense metallic core, confirmed by seismic studies, per geophysics (e.g., “Earth” by Tarbuck).
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Which of the following can be classified as renewable energy source? (CSS-2024)
Machine learning is a subset of AI, focusing on data-driven algorithms, distinct from hardware engineering or cyber forensics, per AI texts (e.g., “Artificial Intelligence: A Modern Approach”).
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Drum printers belong to which of the following category? (CSS-2024)
Drum printers are impact printers, similar to chain printers, using rotating mechanisms, distinct from non-impact inkjet or laser printers, per computer history (e.g., “Computer Architecture” by Tanenbaum).