/sci/ - Science & Math

>>15535448
Why not? Technically the first life forms were heterotrophic and later aquired the ability to be autotrophic.

The same with the eukaryotes. The first were the heterotrophic and then later autotrophic ones came about. The fungi are mostly a form of heterotrophic, namely decomposers.
Both forms came from a single cell heterotrophic eukaryote ancestor that can most certainly be classified as an animal. The split probably came earlier in plants since they are much more different in metabolism from animals compared to the fungi.