HEL ASA Foreign aid is very important, especially for the
United States which is somewhat like the
universal police. Providing foreign aid will improve
our country's foreign relations, which will come in
handy in time of need. The government will
always use your tax dollars for whatever it needs
to use it for, so it really doesn't make a difference
whether it uses it for foreign aid or something
else.

genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism's offspring).

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products