or chemolithoheterotroph . Evidence suggests that some fungi may also obtain energy from radiation. Such radiotrophic fungi were found growing inside a reactor of the Chernobyl nuclear power plant . Flowchart Autotroph Chemoautotroph Photoautotroph Heterotroph Chemoheterotroph Photoheterotroph Endosperm Endosperm is the tissue produced inside the seeds of most flowering plants around the time of