Answer;
B) Red algae
C) Euglena
Explanation;
According to the theory of endosymbiosis, early eukaryotes evolved by symbiotic association of prokaryotes. Which two protists evolved from a symbiotic relationship of organisms, which resulted in eukaryotic organisms containing chloroplasts.
-The first eukaryotic cells evolved from a symbiotic relationship between two or more prokaryotic cells. Smaller prokaryotic cells were engulfed by (or invaded) larger prokaryotic cells. The small cells benefited from the relationship by getting a safe home and nutrients. The large cells (now called hosts) benefited by getting some of the organic molecules or energy released by the endosymbionts.
