Final answer:
All genotypes may not respond to the environment in the same way due to the influence of environmental conditions on gene expression. Sexual reproduction can also contribute to phenotypic diversity in response to changing environments.
Step-by-step explanation:
All genotypes may not respond to the environment in the same way. While an organism's genotype remains constant, the expression of genes can be influenced by environmental conditions. For example, fruit flies with the same genetic makeup can express different patterns of genes under different conditions. Additionally, sexual reproduction can result in offspring with diverse phenotypes, which can be advantageous for survival in a changing environment.