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A particular protein is found in both chloroplasts and prokaryotic cells. The protein is similar in structure and function to certain proteins of the cytoskeleton found in all eukaryotic cells.

Which of the following is an appropriate conclusion to draw from this information?

A

The nucleotide sequence of the genes that code for both proteins are identical.

B

The genes for the eukaryotic cytoskeleton protein are evolutionarily derived from the gene that codes for the prokaryotic protein.

C

Cytoskeleton microfilaments are involved in the processes of photosynthesis.

D

The prokaryotic protein gene and the eukaryotic cytoskeleton protein gene were absent in an ancient common ancestor.

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