They have bilateral symmetry and are invertebrates.
a digestive system with a single opening
A key characteristic shared by all gymnosperms is the fact that they all make seeds. Another shared characteristic is that they do not make flowers.
a characteristic---- usually a homologous structure----shared by all organisms in a group
They all cause disease.
have a trochophore
Barrenness - nothingness
They are all vertebrates.
They're all eukaryotic organisms.
the shape of there molecules :)
They have genetic material and they reproduce.
a Shared ancestral characteristic a shared primitive characteristic
A shared charcteristic is a feature OR CHARACTERISTIC that 2 things share or have in common. For example: A dog and cat- they both have 4 legs, this is a shared characteristic. They also have 2 eyes. hope this helps =)
shape of the molecules