As a biologist studying dinoflagellates (a type of protist) from local oceans, you notice that the chloroplast is surrounded by four membranes. You also notice that the chloroplast shares many characteristics with red algae, and you find circular DNA closely related to cyanobacteria DNA. From this, you hypothesize that this lineage of dinoflagellates was the result of

Answer :

From this, you hypothesize that this lineage of dinoflagellates was the result of ENDOSYMBIOSIS. It benefits both organisms.

What is endosymbiosis?

Endosymbiosis is an ecological relationship where one organism is incorporated inside another and it benefits both.

The theory of endosymbiosis states the eukaryotic cells emerged via this type of relationship.

According to the theory of endosymbiosis, prokaryotic organisms that were introduced into primitive eukaryotic cells led to the formation of chloroplasts and mitochondria.

Learn more about endosymbiosis here:

https://brainly.com/question/1698852

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