Answer:
Photosynthesis
Step-by-step explanation:
- Researchers thought that both chloroplast and Cynobacteria preform photosynthesis as common and hence proposed that chloroplast was evolved from Cynobacteria.
- Chloroplast are one of the most specialized structures present in plant and algal cells. It is a membrane bound organell and its function is to perform photosynthesis by capturing sunlight with the help chlorophyll pigments(present in chloroplast) and convert it into energy(ATP).
- Cyanobacteria are also known as blue green algae because they are blueish green in color due of the presence of photosynthetic pigments in it.
- Cyanobacteria comes under bacteria but they are capable of trapping the sunlight and produce energy without chloroplast. Which shows that they must have some connection with chloroplast.
Result: Cynobacteria are considered as the ancestors of chloroplast.