12. What does the double membrane of the nucleus tell us about the evolution of eukaryote?

Question

12. What does the double membrane of the nucleus tell us about the evolution of eukaryote?

Answer 1

Absolutely nothing.  But, if you put that answer, your teacher will mark it as wrong, even though it's the correct answer.

So bluff.

"The double membrane of the eukaryotic nucleus suggests that originally, the nucleus was an organelle that originated from endosymbiosis.  The outer membrane would be remnants of a vesicle of the original larger organism, and the inner membrane would be remnants of the cell membrane of the invading endosymbiont, which may have been an archaea or very similar prokaryotic organism.  The endosymbiont eventually co-opted all genetic functioning of the organism, resulting in the evolution of the eukaryotic cell as we know it today."

Answer 2

Well, prokaryote don't have nucleus membrane.

So it means eukaryote are much more evolved, because, since their nucleus are isolated, all cellular processes are much more specific and complicated.

Answer 3

This membrane structure is used as part of the evidence to support the endosymbiotic origin of the nucleus rather than it being a separately evolved eukaryotic structure. The concept is that the nucleus was once an archaea species, frequently engulfed by another bacterial species, so the archaeal species eventually became symbiotic rather than digestable.

Looking at other evidence shows that nucleolar proteins have both archaeal and bacterial ancestral homology. That the core protein synthesis machinery is archaeal supplemented by certain proteins of bacterial ancestry and some that evolved after the merger so are solely eukaryotic.

http://www.ese.u-psud.fr/microbiologie/p...

Many lines of different types of evidence must be examined to determine the value of a theory.