Difference between sympathetic and parasympathetic nervous system

Which strategy is an example of how companies may upgrade themselves to meet changing customer preferences? a.doing door-to-door sellingb.using billboards to advertise the productsc. making online shopping services availabled.giving discounts on products

Which phase of the cell cycle ensures that identical copies of the dna are made for daughter cells?

The effect of a hormone on a target cell may be decreased by the presence of