Which best defines cohesion?
a. cohesion is caused by polar water molecules attracting each other.
b. cohesion is caused by polar water molecules repelling each other.
c. cohesion is caused by polar water molecules repelling and not mixing with non–polar molecules.

Abiology teacher asks students to give examples of genetic variations that support the idea that changes in a population’s environment affect genetic variation. which is the least supportive example? a.changes in genetics in human populationsb.antibiotic resistance in bacteria populationsc.pesticide resistance in garden insectsd.changes in the color of the peppered moth population in england