Q: What are jellyfish and other cnidarian's stingers called?


Read this paragraph and choose the correct option from the provided answers:

Cnidarians such as jellyfish have radial symmetry. Flatworms and roundworms, which you will read about next, have bilateral symmetry.

 Choices:

- prokaryotes

- necrocytes

- phenocrysts

- nematocysts


A:
nematocysts