Anaphase I begins when the two chromosomes of each bivalent (tetrad) separate and start moving toward opposite poles of the cell as a result of the action of the spindle. Notice that in anaphase I the sister chromatids remain attached at their centromeres and move together toward the poles.
The average mass makes up the weight of the atom that’s why no atomic weights are the same
oxygen. 99% of your body is composed of oxygen, nitrogen, hydrogen, calcium. 85% of your body is composed with other elements. I hope that helps!!!
Explanation:
precipitation results to chemical weathering. Some rocks can be dissolved by the weakest of acids, with acid precipitation provides.