Less prey means less predatoors
The central nervous system consists of two parts: the brain and the spinal cord. The brain is the center of our thoughts, the interpreter of our external environment, and the origin of control over body movement.
They both contain nucleic acids.
The answer is:
8.1 meters and 8.1 bya
Within the cell are many mitochondria - these are structures which are the sites for aerobic respiration, prodiving energy by converting ADP (adenosine di-phosphate) into ATP (adenosine tri-phosphate) with this reaction: C6H12O6 + 6O2 --> 6H2O + 6CO2 (glucose + oxygen --> water + carbon dioxide). The mitochondria act as the 'power stations' for the cell. Sorry for not using correct subscript notation in the symbol equation, but I can't see how to do it on this website.