As far as I know, fungi are all alien creatures. Heterogeneity means that you can only use the existing organic matter and can't synthesize it yourself to maintain life; Autotrophication can be divided into light autotrophic and chemical autotrophic. Photoautotrophy refers to the way of synthesizing organic matter by using light energy, such as cyanobacteria (formerly called cyanobacteria), and chemical autotrophy refers to the way of synthesizing organic matter by using chemical energy of inorganic matter, such as nitrifying bacteria.