The First Protist Chloroplast was Likely to Have Been A(n)

Question

The first protist chloroplast was likely to have been a(n)
A) symbiotic green alga.
B) chemosynthetic bacterium.
C) example of secondary endosymbiosis.
D) virus.
E) photosynthetic bacterium.

Accepted Answer

The first protist chloroplast is believed to have originated from a photosynthetic bacterium, specifically a cyanobacterium, through a process known as primary endosymbiosis.