_______ occurred when a dinoflagellate apparently lost its chloroplast and took up another protist that had acquired its chloroplast through secondary endosymbiosis.
A) Primary endosymbiosis
B) Secondary endosymbiosis
C) Photosynthesis
D) Tertiary endosymbiosis
E) Asexual reproduction

Question

Quizplus · Accepted Answer

Tertiary endosymbiosis refers to the process where an organism that has already undergone secondary endosymbiosis (where a eukaryotic host cell engulfs another eukaryote that has a chloroplast) is itself engulfed by another eukaryote. This leads to an organism with a complex history of endosymbiotic events, as described in the scenario.

_______ Occurred When a Dinoflagellate Apparently Lost Its Chloroplast and Took