Which best determines the health of a lake used as a source of freshwater? A. its depth and width
B. its temperature and pH
C. its location and depth
D. its temperature and depth

Ts assignment - snow day assignment genetic variation and natural selection natural selection relies on genetic variation. in any population of beetles, there are alleles for brown or green color. what happens to the genotype and the phenotype of the beetle population when there are distinct advantages and disadvantages due to color? order the steps that take place during natural selection in this beetle population.