Water molecule is made of 1 oxygen covalently bound to two hydrogen atoms. Oxygen is more electronegative than Hydrogens and it pulls pairs of
electrons shared closer to itself. As a result Oxygen gains partially negative
charge and Hydrogens gain partially negative charges. What kinds of
molecule is water? *
South Pole
North Pole
Puller
Polar

Which of the following statements is true about the relationship between genetic variation and natural selection? a. genetic variation must be present in a population before natural selection can act on it. b. genetic variation arises in a population as a result of natural selection. c. natural selection can act on a population whether there is genetic variation within the population or not. d. after natural selection acts on a population, the amount of genetic variation in the population always increases.