SignalDifficult5061 t1_izbq0f7 wrote
Reply to comment by astral_melum in Have living things always had an immune system? How did they survive / evolve to deal with diseases, and how does that compare to modern immune systems? by bruceleroy99
NO, this is not true.
CRISPR has it's basis in bacteria adaptive immunity. There are many similar systems.
https://geneticeducation.co.in/how-does-the-crispr-mediated-adaptive-immune-system-work-in-bacteria/
Adaptive immunity mediated by antibodies and specific types of immune cells, maybe, but that wasn't the question.
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