Question

According to the theory of endosymbiosis How did cells acquirenhow did cells acquire chloroplast

Answer 1

According to endosymbiotic theory, the chloroplast evolved as a result of engulfment and assimilation of a Cyanobacteria by an eukaryotic cell.

Explanation:

• Endosymbiotic theory supports the view that ceratain organelles of the eukaryotic cell evolved as a result of engulfment of single celled organism.
• Evidences  that support this theory is the presence of organellar DNA.
• It is assumed that Mitochondria evolved as a result of engulfment and assimilation of an aerobic prokaryote while Chloroplast evolved due to engulfment and assimilation of a photosythetic prokaryote by an Eukaryote.
• After the engulfment ,these organisms however escaped the phagocytosis and began to benefit the eukaryotic Host.
• Soon it lost many of its Genes to the eukaryotic nucleus and became dependent on the Host.
• Thus a symbiotic association was established between the prokaryote and the host.Giving rise to cell organelles.