Which of the following represents the true significance of the finding that the

Question

Which of the following represents the true significance of the finding that the cyanelles of P. chromatophora stem from a different type of cyanobacterium than gave rise to chloroplasts?
This finding indicates that there is a second evolutionary lineage of photosynthetic eukaryotes.
This finding represents the first time that primary endosymbiosis has been directly observed.
This finding is the first evidence that eukaryotic cells do not necessarily digest prokaryotic cells that manage to gain access to their cytoplasm.
This finding is an example of the phenomenon known as "serial endosymbiosis."
This finding is the strongest evidence yet for the theory of endosymbiosis.

Explanation / Answer

"This finding indicates that there is a second evolutionary lineage of photosynthetic eukaryotes. " True. This is the most correct statement. This bacterium is photosynthetic, and the evidence suggests that it came from a different lineage than chloroplasts, suggesting that there are possibly two separate photosynthetic lineages. "This finding represents the first time that primary endosymbiosis has been directly observed. " This isn't true. "This finding is the first evidence that eukaryotic cells do not necessarily digest prokaryotic cells that manage to gain access to their cytoplasm. " This is the opposite from what the evidence is showing. "This finding is an example of the phenomenon known as "serial endosymbiosis." " This is not correct. Serial endosymbiosis is the concept that the endosybiosed organism eventually contributes genetic material to the host. "This finding is the strongest evidence yet for the theory of endosymbiosis." This statement goes beyond what one can claim based on the evidence given.

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