Question

multiple - choice question
what is the second evidence that supports the endosymbiotic theory?
the chloroplasts and mitochondria do not have their own dna or ribosomes. their dna and ribosomes are very similar to eukaryotic cells rather than prokaryotic cells.
the chloroplast have its own dna but the mitochondria does not have its own dna.
the chloroplasts and mitochondria have their own dna and ribosomes. their dna and ribosomes are very similar to prokaryotic cells rather than eukaryotic cells.

Explanation:

The endosymbiotic theory suggests that mitochondria and chloroplasts were once free - living prokaryotic cells that were engulfed by a larger cell. One of the key pieces of evidence for this theory is that mitochondria and chloroplasts have their own DNA and ribosomes. Additionally, the DNA and ribosomes of mitochondria and chloroplasts are more similar to those of prokaryotic cells than to those of eukaryotic cells.
The first option is incorrect because mitochondria and chloroplasts do have their own DNA and ribosomes, and their DNA and ribosomes are more similar to prokaryotic cells.
The second option is incorrect because both mitochondria and chloroplasts have their own DNA.
The third option is correct as it accurately states that chloroplasts and mitochondria have their own DNA and ribosomes, and their DNA and ribosomes are similar to prokaryotic cells, which is in line with the endosymbiotic theory.

Answer:

The chloroplasts and mitochondria have their own DNA and ribosomes. Their DNA and ribosomes are very similar to prokaryotic cells rather than eukaryotic cells.