What is the contour interval of this topography map? 40 50 60

The sea slug that considered to be a photosyntheesizing animal

If garbage is left on the street flies in microbes can arise from nothing to feed on it true or false

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.