In biology, evolution refers to the process through which species undergo genetic changes over time, leading to adaptations that can be beneficial for survival and reproduction. Out of the options provided, the one that represents biological evolution is:
A) A cell starts to express a different set of genes when it is exposed to high levels of testosterone.
This change at the cellular level is an example of an immediate response to an environmental factor (in this case, testosterone), but it is not considered biological evolution. Biological evolution occurs over generations within populations and involves changes in the genetic makeup that are passed down. So while the cell’s gene expression adapts to its environment, this does not reflect a long-term evolutionary change of a species.
On the other hand, option B, where you change your taste in music, is a personal preference and does not pertain to biological evolution at all.