Heres what i got
The chloroplast was discovered in Mereschkowsky in 1905. He stated that chloroplasts are similar to mitochondria but chloroplasts are found only in plants and protista. The chloroplast is surrounded by a double-layered membrane that is involved in energy metabolism. Chloroplasts have a few important parts such as the Stroma, which is the dense fluid within the chloroplast and is the site of conversion of carbon dioxide to sugar, the thylakoid which is the flattened sac-like membrane structures in the chloroplasts. This is the site of conversion of light energy to chemical energy.
Grana is the dense layered stacks of thylakoid sacs. The grana is the site of the conversion of light energy to chemical energy.. Starch is sometimes stored in the chloroplasts. Chloroplasts are necessary for photosynthesis. Plants are the main organisms that use photosynthesis to make their food. In photosynthesis, solar energy is converted to chemical energy.
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Chloroplasts, like mitochondria, have their own DNA. This is most likely because they become incoporated into plants via endosymbiosis.