Will a human being have the same set of cells the he or she is born with when they get older?

Which way do the nitrogenous bases in dna pair up? a. a and g; t and c b. a and c; t and g c. a and t; g and c d. a and a; t and t; g and g; c and c

If water were a non polar molecule, how would its properties be different ? a.) water would be a much lighter molecule b.) water would be able to climb up inside plants c.)water would not be able to form hydrogen bonds d.) water would stick together much more strongly

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