I'm not quite sure what you mean by which sphere, but I found that the most abundant gas on earth is nitrogen at 78%. Hope this helps
Answer:
How does the mitochondria produce energy for the cell answers key?
Explanation:
Mitochondria are the powerhouses of the cell because they "burn" or break the chemical bonds of glucose to release energy to do work in a cell
The force pushing against an area or surface
Electron transport chain produces the most atp
The fertilized egg begins a rapid descent to the uterus. The period of rest in the tube appears to be necessary for full development of the fertilized egg and for the uterus to prepare to receive theegg. ... At the end of this transition period, the embryo becomes a mass of very organized cells, called a blastocyst.
