The smaller a population is, the more allele frequencies may drift.  A family that is enormous, compared to a family that is very small, will have allele differences that are smaller or greater?
greater

At higher concentrations, particles of reactants are crowded closer together, so they are more likely to collide and react.  Ian sees an object with few colliding particles, and he compares it to another object with few colliding particles. Which is true about the objects the object with many colliding particles has a lower concentration of particles or the object with many colliding particles has a higher concentration of particles?
the object with many colliding particles has a lower concentration of particles

Plug-in hybrids run for a longer time on electricity and so are less polluting than regular hybrids.  Kevin has a hybrid car and Steve has a large truck. Which car likely pollutes less hybrid or truck?
hybrid

Therefore, water nearer shore usually contains more dissolved nutrients than water farther from shore.  Eric analyzes water while deep sea fishing and compares it to bottled water. The bottled has more or less nutrients than the deep sea water?
less