What are viral hémorragie fevers (VHFs) ?

Describe the relationship and movement between temperature and density in a convection cell. make sure you identify the direction of travel

When a population split into two subgroups what is most likely to cause the subgroups to develop different traits?

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.