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.