Which is the best example of predation?
Hookworms live in the intestines of dogs and feed on their blood.
Barn owls often capture and eat mice that live in fields.
A colony of termites protects the eggs laid by a queen termite.
Two species of shellfish grow in the same shallow ocean waters.

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.