The photosynthetic euglenids obtained their chloroplasts,which are surrounded by three membranes,through
A) secondary endosymbiosis,retaining the chloroplast from a green alga.
B) primary endosymbiosis.
C) secondary endosymbiosis,retaining the chloroplast from a blue-green alga.
D) tertiary endosymbiosis.
E) None of the above

Question

Quizplus · Accepted Answer

Euglenids obtained their chloroplasts through secondary endosymbiosis, where they engulfed a green alga, which already had chloroplasts from primary endosymbiosis. This process typically results in chloroplasts surrounded by three membranes.

The Photosynthetic Euglenids Obtained Their Chloroplasts,which Are Surrounded by Three