Placozoans, ctenophores, and cnidarians are all considered _______, since they have inner and outer embryonic cell layers.
Placozoans, ctenophores, and cnidarians are all considered diploblastic, since they have inner and outer embryonic cell layers
Placozoans, ctenophores, and cnidarians are all considered diploblastic, since they have inner and outer embryonic cell layers.
Diploblastic animals are characterized by having two primary germ layers during embryonic development. These two layers are known as the endoderm and the ectoderm.
The endoderm is the inner layer, which gives rise to the lining of the digestive tract and other internal organs in some animals. The ectoderm is the outer layer, from which the skin and nervous system develop.
In the case of placozoans, ctenophores, and cnidarians, they possess both the endoderm and ectoderm layers, making them diploblastic organisms. This classification sets them apart from other animals, such as triploblastic animals that have a third germ layer known as the mesoderm, which gives rise to structures like muscles and organs in many more complex organisms.
More Answers:
The Impact of Atmospheric Oxygen on Earth’s Ecosystems: From Mass Extinction to Biological EvolutionThe Importance of Body Segmentation and Hox Genes in Animal Evolution: Specialization and Diversification of Body Parts
The Evolutionary Advantages of Cephalization in Animals with Bilateral Symmetry