Discuss evidence that supports the endosymbiotic theory of eukaryotic evolution?

Answer 1

1.) Mitochondria and plastids are relatively the same size as bacteria

2.) Mitochondria and plastids have nucleiod DNA molecules - just like bacteria.

3.) Mitochondria and plastids reproduce the same way as bacteria - binary fission.

Answer 2

The ribosomes of chloroplasts are more similar in structure to ribosomes found in prokaryotes than to ribosomes found in eukaryotes.

Another answer:

Both chloroplasts and mitochondria have their own DNA and it is not the same as that in the nucleus of the cell.

Answer 3

The strongest piece of evidence for the endosymbiotic theory is the fact that mitochondria and chloroplasts have their own circular DNA, prokaryote fashion, and can still replicate, transcribe and translate some proteins. Their ribosomes are also fashioned as a prokaryotes would be.

Answer 4

The theory of endosymbiosis states that eukaryotic cells evolved when some prokaryotes were engulfed by others and avoided being digested. The theory states that chloroplasts developed from photosynthetic bacteria and mitochondria from aerobic bacteria.

Evidence in support of the endosymbiotic theory includes:

1) The inner membranes of chloroplasts and mitochondria have enzymes and transport systems similar to those found in bacteria

2) They reproduce themselves by splitting into two, similar to the process of binary fission in bacteria

3) They contain circular DNA molecules which are not combined with proteins, like bacteria and unlike the eukaryotic DNA in the nucleus

4) They have their own ribosomes, which are more like bacterial ribosomes than eukaryotic ones.

Answer 5

There are two examples in Biology. Mitochondria found in animals, plants and fungi have their own DNA and they divide on their own. They don't necessarily divide when the cell divides but more of them are needed for the cell. Chloroplasts found in plants also have their own DNA. It is thought that both organelles are symbiotic.

Answer 6

one is 2 cell membranes but I'm not sure of the others.

Answer 7

The endosyymbiotic theory stated that the mitochondria formed through the endosymbiosis of a proteobacteria. It also states that chloroplast formed from the endosymbiosis of a cyanobacteria.

Answer 8

Precense of 70s ribosomes in .Chloroplast and mitochondria.Precense of circular DNA and own mechanisms for protein synthesis in chloroplast and mitochondria.

Answer 9

Chloroplasts and Mitochondria have 70s ribosomes,same as bacteria. They have their own DNA. They can produce proteins themselves.