Final answer:
The statement about Ediacaran fauna that is not true is that Ediacaran fossils share many traits with living groups which make it easy to place them in the tree of life. Ediacaran organisms are known for their unusual forms and do not fit easily into the modern taxonomy.
Step-by-step explanation:
The Ediacaran fauna are known for their unique placement in the history of life on Earth, representing some of the earliest multicellular organisms in the geological record. The correct statement about Ediacaran fauna that is not true is option B: Ediacaran fossils share many traits with living groups which make it easy to place them in the tree of life. This statement is incorrect because the Ediacaran organisms had enigmatic morphologies that make it difficult to fit them clearly into the modern tree of life. They are known for their unusual forms, and while they are multicellular, their relationships to living taxa remain controversial and not well understood.
Options A, C, D, and E contain true statements. The Ediacaran fauna were indeed dominant in the world's oceans from about 575 to 535 million years ago (A), had unique morphologies (C), and may be only distantly related to current life lineages (D). There is also a possibility that they evolved multicellularity independently from living lineages (E).