Multiple choice

Cnidarians are considered as more advanced than poriferans because of

  1. the presence of true germ layers

  2. muscle cells

  3. the presence of nematocysts

  4. an indefinite symmetry
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Nematocysts are the exclusive cells of  cnidarians, which are multifunctional such as used for offence, defence, locomotion etc that are not present in the poriferans.

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