Energy eventually gets transformed into heat and lost. Fortunately for us, the earth does receive energy from the sun, which comes into our closed system and makes life possible. Plants are the primary producers on earth. Plant cells contain chloroplasts, which work as tiny energy capturing factories. It is believed that chloroplasts were once independent prokaryote cells that moved into larger eukaryote cells long ago.
Chloroplasts are tiny and green, and they contain chlorophyll.
They reproduce themselves inside cells by simply dividing into two identical parts. Well, let's think for a minute. Plants are made mostly out of carbohydrates. Carbon is a very important component of plant tissues. Chloroplasts capture the energy from the sun and also capture the carbon dioxide molecules in the air.