What enzyme unwinds or unzips the parent strand?

What is the relation ship between structure and function in an organism

Models are non-visual ways of coummincating how someone thinks about something in the natural world

Plz fast biotechnology is a growing field of applied biology. many crops such as corn have been engineered to be resistant to herbicides. therefore farmers can spray these chemicals to kill weeds growing near the crop without worries of killing the crop itself how does this type of biotechnology work? a. by changing the genetic make up of the crops. b. by causing the crops to kill the weeds. c. by changing the type of crops used. d. by changing the location of the crops.