what is this article about?
The bilateria
are they considered animals?
Yes
are sponges part of them?
No
what else are they called?
bilaterians,
or?
triploblasts
what is the scientific name for the tail?
posterior
what about belly?
ventral
do they have a head?
Yes
what is the other word for head?
anterior
do all of them have a separate mouth and anus?
yes
what has germ layers?
bilateral embryos
how many layers?
Three
please name them
endoderm, mesoderm, and ectoderm
what is the most recent ancestor called?
the "Urbilaterian".
is there anything that doesn't have a front or back?
Yes
what?
jellyfish
what do they have?
a topside and a downside
give me examples of phyla please.
flatworms and gnathostomulids
do they have a digestive tract?
No
are all the bilateria bilaterally symmetrical?
Not all