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I've heard of photoautotrophs, which are just autotrophs that use photosynthesis. What I'm wondering is if there's any other way for an organism to make its own food that doesn't involve it using photosynthesis?

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    $\begingroup$ Chemoautotrophes $\endgroup$ – MikeyC Jun 30 at 21:04
  • $\begingroup$ Welcome to Biology.SE! Please take the tour and then go through the help pages starting with How to Ask questions effectively on this site. In general, we expect you to do some research on your own and then, informed by what you have learned, ask any questions you still have (ideally with references to reliable sources). In particular, since you can easily answer this using reliable sources online this question seems to fit this sites criteria for "homework". (Note this can apply to questions not assigned as homework.) Thanks! 😊 $\endgroup$ – tyersome Jun 30 at 21:57
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    $\begingroup$ I have found that when learning about a new area starting with a relatively accessible and reliable source like Khan Academy is very helpful. Wikipedia is also generally a good starting point and you can then check their references. Online platforms called MOOCs offer free (or very low cost) courses on a wide variety of subjects — two I am familiar with are Coursera and edX. Finally, textbooks with a good level of detail are also freely available online e.g. from NCBI. $\endgroup$ – tyersome Jun 30 at 21:58

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