Asugar cube has a mass of 11.2 g. each side is 2 cm long.
what is the density of the sugar cube? hint: find the volume of the cube first.
a. 5.6 g/cm3
b. 1.4 g/cm3
c. 8 cm
d. 4 g/cm3

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.