Occasionally during pregnacy the placenta can seperate from the uterus. this causes a disruption in development and sometimes death of the fetus. harm to the developing fetus might occur because the placenta

Which identifies the main purpose of biological taxonomy?

What statement about energy is true

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.