The brain contains
billions of interconnected neurons and glia. <span> Glia cells</span><span> enclosed the neurons and provide support for and insulation
between them. It is also the most abundant </span>cell types in the
central nervous system. While Neurons are the basic units of the nervous system and it is the
most important part is the brain.
<span> </span>
I believe it's aerobic exercise.
Answer:
pollution of water. or do you mean pollutant in which case would be like garbage or oil spills
prokaryotic cells do not have a nucleus.