eli5; Why are all plants not poisonous

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If plants develop to protect themselves in their growth why are all plants and flowers not poisonous?

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Anonymous 0 Comments

So we can eat them, or so other animals can eat them. What would animals eat if all plants were poison? Besides, there’s other means of defense from only specific animals, like thorns and traps. A flower, for example can’t be poisonous, because then a bee can’t pollinate it. But it still doesn’t want to be eaten, so it’s steam has thorns instead. There’s also half poisonous plants, like tomatoes. They’re a fruit,that’s supposed to be eaten, but that doesn’t mean the entire plant wants to be eaten and die, so only the vines are poisonous and hairy.

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