
1) Endosymbiotic event
Found on
https://www.crosswordclues.com/clue/apicoplast

An apicoplast is a derived non-photosynthetic plastid found in most Apicomplexa, including malaria parasites such as Plasmodium falciparum, but not in others such as Cryptosporidium. It originated from an alga (there is debate as to whether this was a green or red alga) through secondary endosymbiosis. The apicoplast is surrounded by four membrane...
Found on
http://en.wikipedia.org/wiki/Apicoplast
No exact match found.