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What is a nematocyst?

2 Answers

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A cell specialized in the tentacles of a jelly fish, containing a poisonous effect. 
User Hopeful Llama
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a specialized cell in the tentacles of a jellyfish or other coelenterate, containing a barbed or venomous coiled thread that can be projected in self-defense or to capture prey. hope this helps:)
User StefanHa
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