<span>The cell membrane is one of the great multi-taskers of biology. It provides structure for the cell, protects cytosolic contents from the environment, and allows cells to act as specialized units. A membrane is the cell’s interface with the rest of the world - it’s gatekeeper, if you will. This phospholipid bilayer determines what molecules can move into or out of the cell, and so is in large part responsible for maintaining the delicate homeostasis of each cell.</span>
It was probably when the earth was still Pangaea. whatever had those bones came to that spot, and so happen to die there. then others came and died and kept going.<span />
Population distribution. Population density. Factors Affecting Population Density/Population Change...
Hope this helps.....
General steps from beginning to end:
1) Glycolysis
2) Pyruvate Oxidation
3) Citric Acid Cycle (Krebs Cycle)
4) Oxidative Phosphorylation
Hope this helps!