Four groups of scientists, in different parts of the world, are dating fossils found in a rock layer of the same geologic time period. to validate the age of their fossils, the results of their tests would need to be

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.