The genotype of a plant affects its growth. For example, selected varieties of rice grow rapidly, maturing within 110 days, whereas others, in the same environmental conditions, grow more slowly and mature within 155 days. A producer has control over the genetic factor by his choice of variety. The environment can also lead to molecular, cellular, physiological or behavioral changes. As the expression of genes in an organism can be influenced by the external environment, such as where the organism develops or factors associated with where it is located