A natural boundary is often times a body of water such as a river. Between the US and Mexico, part of the boundary between these two countries is the Rio Grand River. A political boundary is one created by a treaty or some type of political agreement between two countries. For example, the Dominican Republic and Haiti are on the same island. The boundary between them is a political one established when France ruled Haiti and Spain ruled the Dominican Republic.
biological science talk about life,well natural science talks about the universe and its environment
yes because sometimes salons have diff. people who can work with diff. hair!
No. Synthetic chemicals are indistinguishable in every way from natural chemicals.
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Please see:What_is_the_difference_between_a_hub_and_a_switch
diff between radio isotope and radionuclei
Natural (or counting) numbers Integers Rationals Irrationals Transcendentals
they are not diff they are same
diff between official wife and unofficial wife
Ordinary Diff -> One variable Partial Diff -> More than one variable
Natural soap, soda, baking soda (diff. from soda), ungreaser
Magick is a craft. Superstitions are beliefs.