Which of the following pieces of evidence pieces of evidence best supports the endosymbiotic theory?

a.Some organelles in eukaryotes have their own DNA similar to that of prokaryotes

b.Prokaryotes and eukaryotes are both surrounded by a phospholipid bilayer

c.Free living mitochondria and chloroplasts can be found and inserted into eukaryotes

d.Eukaryotes and prokaryotes frequently exchange cytoplasmic material

Organelles have their own DNA, and their genes are very similar to the genes of modern-day prokaryotes. They have membranes that look like those of prokaryotes, and they also seem to divide and replicate in similar ways. If a eukaryotic cell loses an organelle, it cannot remake it. Each eukaryote cell has to inherit at least one copy of an organelle from its parent cell if it is to live. That means that the genetic information needed to make the organelles is not found in the DNA of the eukaryotic cell. All of this evidence supports the theory that the organelles came from outside the eukaryotic cell. We think it tells us that they were once free-living prokaryotes.

Histrionicus Histrionicus · Answer 2 · 2021-12-17T12:06:09+01:00

The following pieces of evidence best supports the endosymbiotic theory - a. Some organelles in eukaryotes have their own DNA similar to that of prokaryotes

The endosymbiotic theory

states that some of the organelles in today's eukaryotic cells were once prokaryotic microbes

Both mitochondria (the energy producer of the cell) and chloroplast (photosynthetic machinery) have their own circular DNA.
The DNA molecules present in the nucleus of eukaryotic cells are in the form of strings and are not circular.
We know that circular DNA is more primitive as seen in all bacteria, linear DNA definitely evolved later.

Thus, The following pieces of evidence best supports the endosymbiotic theory - a. Some organelles in eukaryotes have their own DNA similar to that of prokaryotes

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