Patterns in structure and function are exhibited among ancestral lines of organisms. Which of the following patterns is the best evidence for endosymbiotic theory?(1 point) Responses All cells contain some version of DNA polymerase for DNA replication. All cells contain some version of DNA polymerase for DNA replication. Similar bones can be found in the wing of a bird, hand of a human, and that of a chimpanzee. Similar bones can be found in the wing of a bird, hand of a human, and that of a chimpanzee. Chordates have a closed circulatory system that requires a heart to pump blood. Chordates have a closed circulatory system that requires a heart to pump blood. Eukaryotic cells contain not only their own DNA, but some organelles contain their own unique DNA.

Question

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Answer 1

The best evidence for the endosymbiotic theory among the options provided is:

Eukaryotic cells contain not only their own DNA, but some organelles contain their own unique DNA.

This supports the endosymbiotic theory, which suggests that certain organelles, specifically mitochondria and chloroplasts, originated from free-living prokaryotes that were engulfed by ancestral eukaryotic cells. The presence of unique DNA in these organelles, which is similar to bacterial DNA, provides significant evidence for this theory.