Chloroplasts are proposed to have arisen after archaea cells engulfed ___, in endosymbiosis, allowing the engulfed cell to remain, with specialized function aerobic bacteria aerobic archaea photosynthetic bacteria photosynthetic archaea anaerobic bacteria Solution Ans. Chloroplasts are proposed to have arisen after archaea cells engulfed photosynthetic bacteria, in endosymbiosis, allowing the engulfed cell to remain, with specialized function. The chloroplast of plants closely resembles to cyanobacteria (a photosynthetic bacteria). SO, the organelle is supposed to have evolved when a larger cell (archaean) engulfed it and both the cells exhibited symbiosis. Since chloroplast carriers out photosynthesis, the engulfed cell must also be photoautotroph. So, all options including aerobic bacteria or archaea and anaerobic bacteria are incorrect because they don’t carry out photosynthesis..

1. Chloroplasts are proposed to have arisen after archaea cells engulfed ___, in endosymbiosis,
allowing the engulfed cell to remain, with specialized function
aerobic bacteria
aerobic archaea
photosynthetic bacteria
photosynthetic archaea
anaerobic bacteria
Solution
Ans. Chloroplasts are proposed to have arisen after archaea cells engulfed photosynthetic
bacteria, in endosymbiosis, allowing the engulfed cell to remain, with specialized function.
The chloroplast of plants closely resembles to cyanobacteria (a photosynthetic bacteria). SO, the
organelle is supposed to have evolved when a larger cell (archaean) engulfed it and both the cells
exhibited symbiosis.
Since chloroplast carriers out photosynthesis, the engulfed cell must also be photoautotroph. So,
all options including aerobic bacteria or archaea and anaerobic bacteria are incorrect because
they don’t carry out photosynthesis.