Two scientists co-discover a population of single-celled eukaryotes that do not

Question

Two scientists co-discover a population of single-celled eukaryotes that do not have mitochondria. Whoa! One scientist thinks the cells must be from a lineage that never underwent endosymbiosis, but the other scientist thinks endosymbiosis happened at some point. Which of the following provides the BEST evidence to support the second scientist?

Question 5 options:

the cells are incapable of surviving without sunlight

sexual reproduction is never observed

the nuclear genome has some genes from proteobacteria

the cells also contain chloroplasts

Explanation / Answer

Answer: the cells also contain chloroplasts

Explanation : Both Mitochondria and chlorplast with in the cell cytoplasm reaches due to endosymbiosis, hence support the endosymbiotic theory and support the thinking of second scientist that endosymbiosis happened at some point.

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