[All of these are correct.] Which one of the following statements is correct?

For Competitive Exams

Which one of the following statements is correct?

Germ layers are tissue layers in the embryos of all animals except sponges.

Germ layers include ectoderm, endoderm, and mesoderm.

Flatworms have three germ layers whereas cnidarians and ctenophores have two.

All of these are correct.

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