Vertigo, fluctuating hearing loss, and pressure in the eye are all symptoms of which of the following conditions?

Many farmers prefer cattle without horns because it is safer for their herds. the allele for no horns (n) is dominant to the allele for the presence of horns (n). a farmer mates a male with horns to a heterozygous female without horns. what is the chance that the offspring will have horns?

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?

Can an organism fill more than one trophic level?