In this video, Biology Professor (Twitter: @DrWhitneyHolden) discusses heterotrophs, autotrophs, phototrophs, and chemotrophs and how these categories are used to describe different ways that organisms obtain carbon and energy. Also discussed are the combinations of these categories: photoautotrophs, photoheterotrophs, chemoautotrophs, and chemoheterotrophs.

Want a PDF of the final white board with all the answers written in? Download FREE STUDY NOTES here: https://tinyurl.com/BiologyProfessorN...

A side note, since people have sent in questions about it: The molecules used by chemotrophs can be organic (chemoorganotrophs) or inorganic (chemolithotrophs)! :) Check out my video about that here:    • Lithotrophs vs Organotrophs