He nitrogen cycle is one of the most important and complex of the biogeochemical cycles. it is important because nitrogen: (select 1)(3pts)is a crucial part of the process of photosynthesis. is an essential part of biological molecules such as proteins and nucleic acids (dna). is stored in sedimentary rock. dilutes the oxygen in the atmosphere causing respiratory problems. is the most toxic element to living organisms

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.