Immigration into an existing ecosystem will cause a population to increase if the birth rate is greater than the death rate
the birth rate and death rate are balanced
the birth rate doubles and the death rate does not
the death rate is greater than the birth rate

14) whenever diploid populations are in hardy-weinberg equilibrium at a particular locus a) the allele's frequency should not change from one generation to the next, but its representation in homozygous and heterozygous genotypes may change. b) natural selection, gene flow, and genetic drift are acting equally to change an allele's frequency. c) this means that, at this locus, two alleles are present in equal proportions. d) the population itself is not evolving, but individuals within the population may be evolving.