[Solved] The uptake of naked DNA from the environment is calledــــــــــــــــــــــ . A)transfection B)conjugation C)transduction D)transformation Mutation: A random error in gene replication that leads to a change. Epigenetic Mark: Chemical modifications to DNA or histones that change gene activity without altering the DNA sequence, affecting how genes are expressed. Free-floating Stress Hormones: Hormones like cortisol that circulate unbound in the bloodstream and can affect various parts of the body, often associated with the body's response to stress. Natural Selection: The process by which organisms better adapted to their environment tend to survive and produce more offspring, driving evolution.