Final answer:
DNA microarrays allow researchers to study how an entire genome responds to an environmental stimulus by analyzing gene expression levels. This technology enables the simultaneous examination of thousands of genes and helps understand their response to different environmental conditions.
Step-by-step explanation:
DNA microarrays make it possible for researchers to study how an entire genome responds to an environmental stimulus.
DNA microarrays are methods that scientists use to detect gene expression by analyzing different DNA fragments that are fixed to a glass slide or a silicon chip to identify active genes and sequences. This technology allows researchers to examine the expression levels of thousands of genes simultaneously and understand how they are affected by different environmental conditions.