-
among most
bilaterians,
where the
sense organs and
central nerve ganglia become concentrated at the
front end of the animal.
Bilaterians constitute one...
- It is
often suggested that the
basalmost bilaterians are the Xenacoelomorpha, with all
other bilaterians belonging to the
subclade Nephrozoa. However...
-
other bilaterians. However, a 2007
study concluded that
Acoela and
Nemertodermatida were two
distinct groups of
bilaterians. Xenoturbella, a
bilaterian whose...
- the
difference in the neuraxis, or if an
invertebrate is a non-
bilaterian. A non-
bilaterian has no
anterior or
posterior surface for
example but can still...
- and
molecular markers that are
present in
bilaterians and
absent in cnidarians, ctenop****s, and
bilaterians. Steinmetz, Kraus, et al.
showed that the...
- of
bilaterian animals,
namely the arthropods,
cephalopod molluscs, and vertebrates. Hox
genes organise aspects of
cephalization in the
bilaterians. Cephalization...
- exception. All
known coelomate animals are
triploblastic bilaterians, but some
triploblastic bilaterian animals do not have a coelom—for
example flatworms,...
- the
mouth and ****
happen at four w****s and
eight w****s respectively.
Bilaterians likely evolved from an
ancestor that was
radially symmetrical. There...
- nets seen in
acoels (basal
bilaterians) and
cnidarians are
thought to be the
ancestral condition for the
Planulozoa (
bilaterians plus
cnidarians and, perhaps...
- have
striated muscle,
which in
bilaterians arises from the mesoderm. They did not
commit themselves on
whether bilaterians evolved from
early cnidarians...
