No scientific evidence, eh? Tell me, what classification do mushrooms and jellyfish fall into? Are they multicellulars, or communities of single-cellulars? The evidence is abundant, and clear. While this argument might have traction for people who've never heard of a microscope, too much of the fundamental chemistry, structure, details of reproduction, and DNA in the cells of multicellulars, notibly, such as those for the ribosome, is shared with unicellulars for this argument to be taken at all seriously in present time.
No scientific evidence, eh? Tell me, what classification do mushrooms and jellyfish fall into? Are they multicellulars, or communities of single-cellulars?
They are multi-cellular. And the jump from single-celled to many cells is humongous particularly in animals, a jump which could never have occurred. As to the ribosome, that has nothing to do with multi-cellularity, it is the splitting of organs and functions that is the problem.