One of darwin's principles is that minor variations in all traits exist within species. why is this idea important to his theory of evolution?
a. variation allows some individuals to survive better than others and so evolve over time.
b. variation allows some individuals to interbreed with other species and so evolve over time.
c. variation allows some individuals to move to new environments and develop into new species.

You are the on-duty desk sergeant at the local police station. a man walks in and says, "i killed someone and want to confess." you grab your digital voice recorder and direct the man to a chair. he sits down and tells the tale of what turns out to be a first-degree murder. you record every word, including the numerous instances in which you said, "uh- huh" and "i see." satisfied that the subject did, indeed, commit a murder, you place him under arrest. the confession is: