If Earth suddenly lost its light source but kept the same temperature what forms of life would most likely remain?

Answer 1

Probably none. Plants couldn't really live without light, so the plants would die, along with grass. That would kill almost all of the wild herbivores. Then, the wild carnivores would go extinct, causing no meat for us humans. Though the humans have large brains and probably could figure out what to do, we would die because we lack such substances in meat like protein. It would be most likely that no living species would ever survive such light-loss.

Loss of light=loss of plants. Plants conduct photosynthesis which converts carbon dioxide into oxygen. All life would die in a matter of months.

Answer 2

Deep-sea organisms that rely on chemosynthesis rather than photosynthesis would likely survive, along with some extremophiles such as certain bacteria and archaea that can withstand extreme conditions. Additionally, underground ecosystems supported by geothermal heat might also sustain life.