During summers, male grasshoppers produce sharp chirping sounds by rubbing their hind legs on their front wings, Female grasshoppers also produce similar but softer sounds in response, Why do grasshoppers show this kind of behavior?
•to ward off predators
•to prepare their wings for flight
•to show their abilities to make sounds
•to attract other grasshoppers for breeding

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.