The tendency of water molecules to stay close to each other as a result of hydrogen bonding causes aa of the following except A) the surface tension that allows leaves to float on water
B) the movement of water up the vessels in a tree trunk
C) the inability of ionic compounds to dissolve in water
D) the adhesion of water droplets to the side of a straw

in situ hybridization has been widely used for research applications, including clinical cytogenetics, gene mapping, tumor biology and studies of chromosome evolution.

i think the answer would be d

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