What is the first organization?

Answer 1

[1] There's no all-across-the-board agreement. Some scientists believe the first organisms to be amoebae and fungi, others bacteria. The former are called eukaryotes, because they have nuclei. The latter are called prokaryotes, because they have no nuclei. Those who believe the eukaryotes were first call chloroplasts and mitochondria among the first organisms. Those who believe the prokaryotes were first call the monera among the first organisms. [2] A common assumption has been equating earlier appearance with simplicity. It favors the prokaryotes, for their lack of the more complex nuclei. [3] But a growing argument has been equating earlier appearance with complexity, later appearance with streamlining into simplicity. It favors the eukaryotes, for their nuclei which the projaryotes supposedly jettisoned in their efforts to streamline. [4] Another assumption has been linking earlier appearance with areas of heat, deep within the oceans. It favors the prokaryotes, which handled high temperatures much better than the eurkaryotes. [5] The oldest known fossils date back 3.5 billion years. They're the stromatolites of Glacier National Park. And they contain cyanobacteria microbes. [6] Some scientists say that there's an even older first organism that was the ancestor common to both eurkaryotes and prokaryotes. But they disagree on whether that ancestor evolved first into the former and then the latter, or vice versa.

Answer 2

The Catholic Church