How does the process Of cellular differentiation create many different cells with different functions with the same DNA?

Many state and local authorities are making laws regarding recreation on lakes, rivers, and oceans to reduce water pollution. why would lawmakers need to consult with scientists before making these laws? a) to make scientists feel important b) so that the laws reduce pollution by a sufficient amount c) so that parks and lakefront facilities will still make large profits d) so that the public will believe that the laws are important to follow

Will someone me with this.. specialized cells which perform a particular function form: tissues organs or organism

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.