The chloroplasts of land plants are thought to have been derived according to the evolutionary sequence -: cyanobacteria → green algae → land plants
Endosymbiosis is a process in which an ancestral prokaryote engulfed a photosynthetic cyanobacterium that evolved into modern-day chloroplasts.
- Molecular and morphological evidence suggests that the chlorarachniophyte protists are derived from a secondary endosymbiotic event.
- The primary chloroplast found in plant cells originated when an ancient unicellular organism engulfed a cyanobacterium, which lived inside the host.
- descendants of the host and the endosymbiotic cyanobacterium became more integrated green algae that reach to land plant evolution.
Thus, The chloroplasts of land plants are thought to have been derived according to the evolutionary sequence -: cyanobacteria → green algae → land plants
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