Evolution 

Norm of Reaction
• Norm of reaction: a curve representing the phenotype associated with a particular genotype over a range of environmental conditions.

Phenotype: The observable physical, developmental, and behavioral characteristics of an organism

Environment (E)
• Physical and ecological context of individuals
within a population.

Genotype: Either the combination of alleles that an individual has at a given locus or the combination of alleles that an individual has at all loci.