The Earth is closest to the Sun, or at the Perihelion, about two weeks after the December Solstice, when it is winter in the Northern Hemisphere. Conversely, the Earth is farthest away from the Sun, at the Aphelion point, two weeks after the June Solstice, when the Northern Hemisphere is enjoying warm summer months.
Mitochondria are essential components of nearly all cells in the body. These organelles are the powerhouses for cells, providing energy to carry out biochemical reactions and other cellular processes.Mitochondria make energy for cells from the chemical energy stored in the food we eat.itochondria are essential components of nearly all cells in the body. These organelles are the powerhouses for cells, providing energy to carry out biochemical reactions and other cellular processes.
Components in a nucleus [edit]. The cell nucleus is an important organelle because it is where genes and their controlling factors are formed. In order to do so, it needs the helps of the stored components: 1  Chromosomes: store and organize genes that allow cell division.2  Nuclear pores: transport regulatory factos and gene products.he cell nucleus is an important organelle because it is where genes and their controlling factors are formed. In order to do so, it needs the helps of the stored components: 1  Chromosomes: store and organize genes that allow cell division.