Which of the following units would be the most appropriate for measuring the mass of a child? a. centigrams b. milligrams c. grams d. kilograms

Which of the following particles always has a positive charge? a. electronb. neutron c. proton d. ion

Name the tissue types that form the wall of each organ in questions 7-10

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.