The correct answer is Three germ layers. The feature, three germ layers, is only shown by higher invertebrates, as compared to lower invertebrates. The formation of the three germ layers is caused by the morphogenetic movement called Gastrulation.
There are 3 Oxygen atoms bonded to 1 Nitrogen atom.
Hope this helps!
-Payshence
Answer:
39, 78 I think I'm so sorry if I'm wrong
I think this is A but I'm not 100% sure (: