What explanation fits the growth model portrayed in the graph? a) limits to resources exist for a population. b) there were no limits to resources in the given population. c) food was in surplus for the population since it increased at a constant rate. d) gestation periods lengthened as time went on, decreasing the growth rate of the population.

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.