Believed that use (or lack of use) of body parts enables individual to develop certain traits that it passes on to its offspring while believed that species are fixed forms that do not change over time. aristotle… lamarck lamarck… aristotle darwin… aristotle lamarck… darwin

The hershey and chase experiments involved the preparation of two different types of radioactively labeled phage. which of the following best explains why two preparations were required? a. the bacteriophage used in the experiments was a t2 phage. b. it was necessary that each of the two phage components, dna and protein, be identifiable upon recovery at the end of the experiment. c. each scientist had his own method for labeling phage, so each conducted the same experiment using a different isotope. d. establishing the identity of the genetic material required observation of two phage generations.