A heterotroph is an organism that cannot make its own food from sunlight and carbon dioxide, so it must obtain energy by consuming other organisms or organic compounds. Heterotrophs are essential to life on Earth because they break down the organic compounds produced by autotrophs, cycling nutrients and energy through ecosystems via cellular respiration.
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異營生物(英語:heterotroph),亦作異养生物,指不能直接利用無機物或有機物维生,必須攝取現成的養分來維持生存機能的生物。異營生物包括捕食、寄生和腐生三種。異營性動物細胞需要的物質為水和礦物質,更須要有機碳:葡萄糖、基本氨基酸和維生素,因此必須直接或間接依賴自养生物(例如綠色植物,亦稱生產者)之製造供給養分,然後再出水解酶分解加以利用。異營性單細胞和多細胞動物所需要的營養幾乎相同,只有少量不同,如人和原生動物為例。所以,異營性動物完全依賴外界食物,一旦進入細胞內即可進行消化產生能量,此為異營性動物之特徵。
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).