The pollutants in 1970 were the highest since recorded history and are declining steadily.
The correct answer is C. Artiodactyls
They've been around more than the others and have existed for some 55 million years.
Cell division begins along the cell's equator, between the two chromosomal poles that form during nuclear division. Microflients help the cell lay down new membrane and divide it into two daughter cells.
