Where Did Diploblastic Come from?

Diploblastic organisms are organisms which develop from such a blastula, and include cnidaria and ctenophora, formerly grouped together in the phylum Coelenterata, but later understanding of their differences resulted in their being placed in separate phyla. The endoderm allows them to develop true tissue.

What is the first diploblastic animal?

Answer: Cnidaria and Ctenophora are considered as diploblastic.

Which of the following organisms is diploblastic in origin?

Pertaining to a condition in which there are two primary germ layers, such as ectoderm and endoderm. Examples of animals that developed from a diploblastic embryo are cnidarians and ctenophores. Word origin: Greek diplóos, twofold + blastikós, budding.