Which of these, if true, would support the claim that the ancestral cnidarians had bilateral symmetry?
1)Cnidarian larvae possess anterior-posterior, left-right, and dorsal-ventral aspects.
2)Cnidarians have fewer Hox genes than bilaterians.
3)All extant cnidarians, including Nematostella, are diploblastic.
4)β-catenin turns out to be essential for gastrulation in all animals in which it occurs.
5)All cnidarians are acoelomate.