system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why wouldn't life on another habitable planet look similar to Earth's?
gpt
There probably would be similarities.  Things that were swimmers would probably be sleek, for instance, due to natural selection.  It's just that there would have been an entirely different evolutionary history and so different things may/would have been tried that didn't get a chance on our world.