Scientists conducted an experiment: they let insects into plants and sampled leafs chemistry before and after.
Long story short, leafs released substances that is intended to scare or kill insects eating them.
The conclusion was made: vegetables are alive and do feel being eaten.
Steak in a fridge will never be alive and will never become a cow again.
Part of almost any plant, even separated from stem, with enough care can grow to a new plant.
Meaning that this leaf is alive and can feel pain.
Dear vegans, suit yourself.
Written by: Goury