Question

patches of mesodermal cells are present in
a) platyhelminthes
b) aschelminthes
c) porifera
d) cnidaria
plz answer correctly

Answer 1

I think it's a answer

Answer 2

Patches of mesodermal cells are present in

a) platyhelminthes

b) aschelminthes

c) porifera

d) cnidaria

Answer: a) Platyhelminthes

Reason for the answer: Flatworms(ie, Platyhelminthes) have a feature that the sponges and cnidarians do not, a middle layer of actual organized cells. Flatworms have three cell layers: an ectoderm, an outer covering like the other groups have; an endoderm, a lining of the digestive spaces somewhat like a cnidarians; and a mesoderm between the other two. With actual tissues protected like this, another evolutionary "explosion" of features happened. Mesoderm allows tissues to organize into organs and even connect in organ systems, so flatworms are much, much more complex than cnidarians