Answer:
Enzymes unwind the DNA molecule into two strands.
Explanation:
I just took the quiz and it was correct
Letter A. This is true it is caused from bacteria on the skin.
Answer:
I believe it is A, but I could be wrong.
Explanation:
I think this, because when it says, "Other, less useful, versions of the genetic code were eliminated gradually throughout the course of evolution", I think it referencing to the fact that all animals and etc, are made up of common codes, and how over time, through evolution, certain codes were eliminated, because creatures were evolving.
A the concentration gradient!
Answer:
remove waste and other harmful substances from the body
Explanation: