Which Statement Is Correct with Regard to the Comparison of Secondary

Multiple Choice

Which statement is correct with regard to the comparison of secondary endosymbiosis to primary endosymbiosis?

A) In secondary endosymbiosis,an entire free-living alga is ingested into the food vacuole of a heterotrophic eukaryote.
B) In secondary endosymbiosis,an entire free-living alga is incorporated into the mitochondrion a heterotrophic eukaryote.
C) Primary endosymbiosis is the result of alga being engulfed by a cyanobacterium.
D) Primary and secondary endosymbiosis are essential equivalent but occurred at different points in time in the evolution of life.