The First Animals to Show True Tissues Were

Question

The first animals to show true tissues were
A)sponges.
B)placozoans.
C)cnidarians.
D)ctenophores.

Accepted Answer

Cnidarians, such as jellyfish and sea anemones, were the first animals to have true tissues, which are distinct layers of cells that perform specialized functions. Sponges and placozoans do not have true tissues, and while ctenophores also have tissues, they evolved after cnidarians.