In some plants, flower color, or of the plant, is dependent upon environmental factors such as the acidity of soil. a) allelism b) dominance c) genotype d) phenotype

The answer would be d) phenotype. The phenotype is the physical characteristic while the genotype is the combination of alleles from the parent--basically the part that you can't really see. The color of a flower is prominent, so that would be its phenotype. An organism's phenotype can also include certain behavioral characteristics as well, not just the way it looks! Hope this helped :)