Their common body form is an example of convergent evolution.
It is clear that there has been evolution and adaptation within the general body form.
"I've never had the terrorism of body form," she says.
There are 30 different species worldwide and they all show variations on the same body form.
In most species the juveniles gradually develop the body forms of their parents.
Your body form was there long enough to contaminate the cave.
The general body form is like those of other species in the genus.
Some sponges and cnidaria have this kind of body form.
It has the ideal body form to deal with that.
