The cells formed by the end of mitosis had 8 picograms of DNA. These cells entered in the process of the cell cycle. The G1 phase of interphase would duplicate their cellular content. S phase of interphase would include DNA replication. During this phase, the content of DNA in the nuclei of these cells would be doubled. By the end of the S phase, there would be 16 picograms of DNA in nuclei of each of these cells.
These cells would enter the G2 phase where the DNA content is maintained. Therefore, by the end of the G2 phase, each of these cells would have 16 picograms of DNA.
I believe it’s the sun As the sun gives nutrients to the plant Plant gets satin by animal Animal gets eaten by animal and so on and the nutrients would be passed on