Select the true statements concerning ctenophores.Check All That ApplyThey are diploblastic.They are diploblastic.They have some tissue derived from mesoderm.They have some tissue derived from mesoderm.They have a modified radial symmetry.They have a modified radial symmetry.They are a type of jellyfish.
Question
Select the true statements concerning ctenophores.Check All That ApplyThey are diploblastic.They are diploblastic.They have some tissue derived from mesoderm.They have some tissue derived from mesoderm.They have a modified radial symmetry.They have a modified radial symmetry.They are a type of jellyfish.
Solution
The true statements concerning ctenophores are:
- They are diploblastic. This means they have two primary germ layers, the ectoderm and the endoderm.
- They have a modified radial symmetry. Unlike radial symmetry, where any cut through the center creates mirror halves, modified radial symmetry may not always result in exactly identical halves.
- They are not a type of jellyfish. Although they are similar in appearance and are both part of the phylum Cnidaria, ctenophores are a distinct group, also known as comb jellies.
- They do not have some tissue derived from mesoderm. As mentioned, ctenophores are diploblastic and only have tissues derived from two germ layers, the ectoderm and endoderm. The mesoderm is a third germ layer present in triploblastic organisms.
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